Question

Carys calculates the total amount EEE, in dollars, that she earns for working hhh hours using the equation E=10hE=10hE, equals, 10, h.

How many dollars does Carys earn per hour?
dollars
At that rate, how many hours does it take Carys to earn one dollar?
hours

Answer 1

• it takes carys 0.1 hours to earn 10 dollars

Explanation:

1. First we want to know how much Carys earns for working 1 hour. Since h gives us the number of hours Carys works, we can substitute h= 1 into the equation and solve for E.

• E = 10h

• E = 10 ⋅1

• E = 10

Carys earns 10 dollars per hour

2. For the second question, we know the total amount Carys earns equals 1 dollar, but we do not know the number of hours. We'll substitute into our original equation again.

• E = 10h

• 1 = 10h

• 1/10 = 10h/10

• 0.1 = h

It takes Carys 0.1 hours to earn 1 dollar.

• Carys earns 10 dollars per hour.

• It takes Carys 0.1 hours to earn 10 dollars.

⇒ p.s : I did this on khan Academy

Answer 2

• $10 per hour
• 0.1 hours

Explanation:

To find Carys' earnings in one hour, fill in h=1 in the formula:

E = 10·1 = 10

Carys earns 10 dollars per hour.

__

To find the number of hours required to earn 1 dollar, fill in E=1 in the formula:

1 = 10h

0.1 = h . . . . . divide by 10

It takes 0.1 hours for Carys to earn 1 dollar.