Question

PLEASE HELP I got 3/8 is that correct or wrong??

The band at Crest Elementary School has 9 flutes, 6 clarinets, 3 trumpets, 2 trombones, 1 tuba, and 3 French horns.

If one instrumentalist is chosen from the band, what is the probability that the student plays the flute?

Answer 1

I will take a look... one sec

Answer 2

k thanks :)

Answer 3

right

Answer 4

prob = (# flutes) / (total # instruments) = 9 flutes / (9+6+3+2+1+3) = 9 / 24
You can simplify as 3/8
So...

You are right!!

Answer 5

awesome !!!

Answer 6

if im doing a similar problem and i get 14/50 which is 3.571 what would that simplify to because i really suck at doing that not sure what the process is to do that because i am unable to simply look at that and just KNOW what it is ya know

Answer 7

7/25

Answer 8

I usually check to see if both top & bottom are even... if they are, you can always factor out a 2 out of each... just to get started.

Answer 9

Knowing the decimal answer usually isn't helpful

Answer 10

oh ok that makes sense

Answer 11

When you had 9/24, you would need to "just know" that both 9 and 24 are divisible by 3... those multiplication tables you "loved" will come in handy ;)

Answer 12

k so if its 8/24 is that 1/3?

Answer 13

yep

Answer 14

keep dividing out anything in common from the top & bottom till you're done and can't do any more. Often it's best to just leave it as a fraction then, not use the calc to get a decimal unless the answer needs to be in a decimal form

Answer 15

So, if you did probability, 7/25 is fine. Unless you need a probability given as a percentage, then use the calculator

Answer 16

Georgia built a model of the Empire State Building that is proportional to the actual building. The actual building is 187 feet wide and 1,454 feet tall. Her model is 10 feet tall.

Approximately how wide is Georgia's model?

Answer 17

i did some work and got 1.87 but im not sure if thats right

Answer 18

187 ---> 10

1454 ---> ?

so shrink by multiplying by (10/187)

1454(10/187) = 7.7754 ft

Answer 19

You can check the shrink factor on the info they give you...
187 (10/187) = 10

Answer 20

These numbers aren't "pretty" because they used a real life example where the fractions don't easily simplify

Answer 21

.77?

Answer 22

What do you mean?

This is just like the original question with the poster, except that the numbers are messier. In the original, the scale factor made the finished poster bigger by (5/2). This one makes the model building smaller by (10/187)

Answer 23

so do i take 187 and divide it by 10

Answer 24

well that cant be right actually ugh

Answer 25

yes and no... those 2 numbers are how you make the scaling factor, but you have to be careful to put the right one on top and bottom

Answer 26

AACK, I messed up

Answer 27

So sorry!!

I had length and width mixed up.

Answer 28

so i got .053 but the possible answers are
A. 0.77 feet
B. 2.72 feet
C. 1.87 feet
D. 1.29 feet

Answer 29

Shrink that building from 1454 feet tall down to 10 feet tall by multiplying by (10/1454). The width is then 187 in the original down to 187(10/1454) in the model

Answer 30

1.286 ---> 1.29 (d)

Answer 31

Uggh... sorry I read it wrong.

Answer 32

its all good i was confused anyways lol

Answer 33

original new
number ---> number

multiply "original" by "(new/original)" to find "new"

Answer 34

Remember that, and it works for shrink or grow.

Answer 35

.The actual F-16 has a length of 14.8 meters and a wingspan that measures 9.8 meters. Her model has a length of 0.5 meter.

What is the approximate measure of the wingspan on April's model?

i got 0.33 is that right?

Answer 36

14.8 (0.5/14.8) = 0.5 meter for length

So for wingspan, 9.8 (0.5/14.8) = 0.33

Answer 37

In other words, you got it... :)

Answer 38

see i didnt do it like that at all lol haha

Answer 39

Miranda hiked to the top of a waterfall. She wanted to know the waterfall's height, but she was unable to measure it. Miranda created a proportion using the information from triangles PQS and TRS to calculate the height of the waterfall.



How tall is the waterfall? (Round your answer to the nearest foot.)

Answer 40

A. 550 ft.
B. 806 ft.
C. 168 ft.
D. 648 ft.

Answer 41

(looking at the picture now)

Answer 42

So, triangle STR is similar to triangle SPQ. That means the side ST is proportional to the whole side SP. That proportion is the same proportion as the height TR is to the waterfall height PQ.

Answer 43

730 (256+730)/(730) = 256 + 730 = 986

For the waterfall, 480 ( 986/730) = 648

Answer 44

Is that making sense?

Answer 45

ok yeah it does

Answer 46

if 8 ft long is converted to 4 inches long then 3 1/2 feet wide would be converted to 1 1/2 inches right?

Answer 47

8 feet x (4 inches/8 ft) = 4 inches

Answer 48

probably because the answers are
9 inches
2 inches
1 3/4 inches
1 1/2 inches

Answer 49

I got 1 3/4 inches the first time I did it. How did you get 1 1/2 ?

Answer 50

Anyway, looks like it's (c) on your choices

Answer 51

On that one, you have to be careful to keep the units straight. you can't mix the ft and in directly, so you have to convert something somewhere

Answer 52

thats why i wasnt getting it haha

Answer 53

Lots to remember, but you're getting it

Answer 54

Do you pretty much "get" the idea of scaling up and down now? There may be other ways they try to confuse you or throw you off, but the scaling idea is the same on all

Answer 55

yeah better its just like every different problem on that that they give me is more and more confusing haha

Answer 56

what's the next one?

Answer 57

Max is building a scale model of the solar system. In Max's model, the distance from Earth to the sun is 1.2 feet, and the distance from Venus to the sun is 0.86 feet.

If the approximate distance from Earth to the sun is 93 million miles, what is the approximate distance from Venus to the sun?

Answer 58

Care to set it up and I will check it? Or do you want to walk through it again to be sure you have the concept?

Answer 59

when i look at this problem i think that i need to take 98 million miles and divide it to 1.2 then that i take that answer and try using that same number to get the answer for the other number but ugh thats probably not right

Answer 60

Slow down just a step...
Say you have a magic wand and can magically make the 1.2 feet distance into 93 million miles. The "magic" is really just multiplying by (93 million / 1.2 )

Answer 61

kk

Answer 62

So, Venus starts at 0.86 feet, and "MAGIC" happens... 0.86 (93 million / 1.2) = 66.7 million

Answer 63

and you "know" which number goes on the bottom, because it's the one you have to get rid of by cancelling in the fraction. So if you start with 1.2, 1.2 must be on the bottom so it cancels to leave 93 million.

Now that you have the scale proportion fraction correct, use that "magic" on the other term, so 0.86 inches mult. by the proportion = 67 million

Answer 64

I think you had this one right too... except you used 98 million instead of 93 million