Isabelle wants to become an astronaut! She has decided that she will spend 20% of her day studying. If she is awake for 15 hours each day, how
long is she spending studying?

3 hours

Step-by-step explanation:

Assuming that when the problem says "day" it refers to the hours of wakeness.  The problem is essentially asking to find 20% of 15.

First, convert 20% to decimal form. To do this, divide (20) by 100, this is because a percent is out of 100.

20 / 100 = 0.2

Now multiply the hours of wakeness by the percent as a decimal;

15 * 0.2 = 3

Isabelle spends 3 hours studying.

c = 0.429t

step-by-step explanation:

the constant rate at which carlos harvests cassava is 35 minutes per 15 cassavas 15/35 = 0.429 cassava per minute

therefore, an equation that models the number of cassava (c) that harvest carlos in a time (t) is the following:

where t is the time in minutes.

this means that when 35 minutes have elapsed 15 cassava have been harvested, at 70 minutes 30 cassava have been harvested and so on.

(1,-1) i hope this

step-by-step explanation: