Question

What should be measured to calculate the average rate at which water flows in a dam?


Distance of water flow and duration of water flow

Number of liters of water flowing and duration of water flow

Distance of water flow and size of the dam from which water flows

Number of liters of water flowing and size of the dam from which water flows

Answer 1

number of liters of water and duration of flow

Answer 2

I'd say the second answer because you need an amount and a time frame

Answer 3

that was my first guess, thanks

Answer 4

cool

Answer 5

wanna help me with another question ?

Answer 6

sure

Answer 7

The equation below shows the perimeter f(x) of several rectangular pieces of cardboard having width x inches:

f(x) = 52 + 2x

The perimeter of each piece is less than 100 inches. Which of the following best describes the domain of f(x)?

All real numbers greater than 0 and less than 100

All real numbers greater than 0 and less than 24

All integers greater than 0 and less than 100

All integers greater than 0 and less than 24

Answer 8

the first one

Answer 9

If you set up an equation like this\[100>52+2x\] and then just solve for the equation.

Answer 10

No it's not the first one.

Answer 11

why not @TheBadWolf ?

Answer 12

It's the second, because if you put a number into that equation that is greater than 24 your function is over 100

Answer 13

so its All real numbers greater than 0 and less than 24

Answer 14

no wait

Answer 15

yeah

Answer 16

in the question its given each piece is less than 100
therefore x can attain values between 0-100

Answer 17

u r wrong @TheBadWolf

Answer 18

omg guys !

Answer 19

yeah f(x) IS THE VALUE OF THE PERIMETER OF THE JOINED PIECES AND NO CONDITION IS GIVEN THERE THAT IT CANT BE GREATER THAN 100. ITS THE VALUE OF EACH PIECE THAT CANNOT BE GREATER THAN 100.

Answer 20

THe function \[f \left( x \right)= 52-2x\] has to be less then 100

Answer 21

NO

Answer 22

ok im on another level of confusion now

Answer 23

just a second @yeah_i_suck_at_math . i hav a doubt with the question

Answer 24

is it perimeter of each piece is given by f(x) or all the pieces?

Answer 25

I think the 52 = 2L and the 2x symbolizes 2w. when you add them together you get the perimeter

Answer 26

so in order for the perimeter to be less than 100 the function has to be less than 100

Answer 27

@TheBadWolf what u say is right. But im having a confusion. as the question says "the perimeter of several pieces of cardboard is given by f(x)" it says several. so is f(x) the perimeter of several pieces or of 1 piece only?

Answer 28

so ....

Answer 29

all of the perimeters are less than 100 and all the lengths are the same. the onlything that changes is the width. the range for the width while keeping the perimeter under 100 is All real numbers greater than 0 and less than 24

Answer 30

so it was B all along ?

Answer 31

okay i admit i was wrong. sorry @yeah_i_suck_at_math nd @TheBadWolf

Answer 32

yeah

Answer 33

its ok

Answer 34

help me with another one ? it looks simple..

Answer 35

sure

Answer 36

The weights of four packets of sugar are shown below:

Packet A: 4.35 pounds
Packet B: 4.42 pounds
Packet C: 4.48 pounds
Packet D: 4.39 pounds

Sandy has a scale that measures to the nearest tenth of a pound. If Sandy weighs each packet on her scale, the heaviest reading will be _____ pounds.

Answer 37

Btw no hard feelings @random231 it's all good.

This question wants you to rund to the nearest tenth. The tenth spot is the one directly to the right of the decimal.

Packet A would read as 4.4
Packet B would also read as 4.4
Packet C would read as 4.5
and Packet D would again read as 4.4
So packet D is the heaviest reading the scale will register

Answer 38

packet d is 4.4 and so is a and b ...

Answer 39

i think u meant c is th heaviest

Answer 40

yeah sorry whoops

Answer 41

do i enter it as 4.48

Answer 42

or 4.5

Answer 43

doesnt say to round

Answer 44

write 4.48

Answer 45

Sandy has a scale that measures to the nearest tenth of a pound...

Answer 46

well the scale automatically estimates because it only shows the first decimal place. The highest READING it will give is 4.5 and that would fill in your blank

Answer 47

help me with another one ?

Answer 48

Jack wants to fill a rectangular box with sand. The length of the sand box is 3 feet, width is 6 inches, and height is 2.4 inches. Each bag of sand contains 0.15 cubic foot of sand. How many bags of sand will Jack need to fill the box completely?

[1 foot = 12 inches]

Answer 49

volume of sand required = 3*0.5*0.2 cubic feet

Answer 50

well to find the volume you multiply the hieght, width, and length so\[36 \times 6 \times 2.4=\] I use 36 because 3 ft is equal to 36 inches

Answer 51

when you find the answer to that equation you divide it by 12 to turn it back to feet and then by .15 to figure out how many bags you need

Answer 52

so no of bags required = (3*0.5*0.2)/0.15

Answer 53

so 518.4

Answer 54

I got 288 bags

Answer 55

288 bags ?

Answer 56

yea so its 288

Answer 57

288?

Answer 58

yeah... ?

Answer 59

No actually I'm wrong, because 36x6x2.4=518.4in cubed but we need feet cubed so divide by 12 three times because it needs to be cubed

Answer 60

ans = 2bags

Answer 61

and then dived by.15 and random is correct

Answer 62

why dont u convert inches to feet in beginning?

Answer 63

6=0.5 ft
2.4=0.2ft

Answer 64

so 2 bags is the answer ?

Answer 65

yea

Answer 66

it was easier for me I guess. In hindsight that works better, but yes 2 bags is your answer

Answer 67

ok how about this one ? thanks btw guys

A car can travel 25 miles per gallon. Approximately how many gallons of fuel will the car need to travel 30 km?

[1 mile = 1.6 km]

0.05

0.52

0.75

0.83