At a restaurant the ratio of kids meals sold to adult meals was 8 to 5 if there were 72 kids meals sold how many adult meals were sold

45

Step-by-step explanation:

There were 72 kids meals sold which is represented by 8 parts of the ratio.

Divide by 8 to find the value of one part of the ratio

72 ÷ 8 = 9 ← value of 1 part of the ratio, thus

5 × 9 = 45 ← number of adult meals sold

The answer is 45

b

step-by-step explanation:

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