David can earn 400 dollars in 10 hours inflating balloons for kids. He wants to know how much he can earn if he spends 20 hours doing the same thing. Select all the equations from the below answer choices which can be used to find the answer.

Step-by-step explanation:

400/10 to get one hour, do 40 dollars per hour! And then it’s 20 hours so you take 40 times 20 and that’s 800 dollars!

800 dollars is your answer.

Step-by-step explanation:

400/10 to get one hour it is $40 per hour! That is 20 hours. 40 x 20= 800 dollars.

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

they used 313 gallons of paint