Question

help??

Answer 1

Hi! What do you need help with?

Answer 2

What you need help with?

Answer 3

1. Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 90 pounds of algae, how much algae will be in the pond after 12 hours? (1 point)
720 pounds
360 pounds
1,440 pounds
114 pounds

Answer 4

Alright, this sounds pretty easy! Okay, so, it doubles every hour.

Answer 5

it will double three times since \(12\div 4=3\)

Answer 6

if we start at 90, after 4 hours it will be how much?

Answer 7

180

Answer 8

Yep! so, then we add 4 more hours to that to make it 8 hours. How much is it now?

Answer 9

360

Answer 10

Yep! now, lets add a final 4 hours to make it 12. How much is it now?

Answer 11

720

Answer 12

Yep! So, at 12 hours there will be 720 pounds of algae :) Great job anna!

Answer 13

2. What is the order of the numbers from least to greatest?

A = 6.2 × 10–5 B = 12.3 × 10–7 C = 5.2 × 103 D = 3.7 × 10–5

(1 point)
D < C < A < B
B < D < A < C
D < C < A < B
B < A < C < D

Answer 14

Okay, well first we need to simplify this, and multiply them. After you do this, what do you get?

Answer 15

(Dont forget the order of operations, multiplication comes before subtraction)

Answer 16

So, for A, you would do (6.2 x 10) - 5

Answer 17

i cant figure out how to find 5.2x10^3

Answer 18

Okay, well you would do the exponent first (im assuming thats an exponent?)

so, you would do 10 x 10 first, which equals 100. then, 100 x 10 which equals 1000.

From there, you take 1000 x 5.2 which is?

Answer 19

5200

Answer 20

they are actually all exponents

Answer 21

Oh, can you re-write them with the ^ like you did the last time to make it for clear? If not, let me know if you have a difficulty and i can explain it :) after we multiply this, it should be very easy to see the smallest number, greatest number, and everything in-between :)

Answer 22

And yes, 5200 is correct :) Good job!

Answer 23

2. What is the order of the numbers from least to greatest?

A = 6.2 × 10^–5 B = 12.3 × 10^–7 C = 5.2 × 10^3 D = 3.7 × 10^–5

(1 point)
D < C < A < B
B < D < A < C
D < C < A < B
B < A < C < D

Answer 24

Okay, that helps, thank you. Well, now we know that C = 5200. Have you done A and B as well?

Answer 25

idk how to do it with negatives

Answer 26

Well, there are some rules when multiplying integers.

Positive x negative = negative
Positive x positive = positive
negative x negative = positive
negative x positive = negative

So, 2 positives makes a positive. 2 negatives makes a positive, and 1 negative makes a negative.

I know it probably will be hard to learn, but youll get it eventually :) Practice makes perfect! And dont be afraid to look it up if you need to :)

Answer 27

i cant figure it out