Terry makes $50 a week babysitting his brothers and sisters. He saves 30% of the money each week to go on a trip with his school. How much does he save each week?

Terry saves $15 each week.

Step by step:

1. 50 divided by 10, you get 5 which is 10%.

2. 5 multiplied by 3, you get 15 which is 30%.

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

v=1788.75

step-by-step explanation:

i belive that is the answer