.HELP ME PLEASEE IM IN AN EXA Billy was asked to solve 3^5∙3^4. He got 9^20. What error did he make? *

a) When he multiplies exponents, he is supposed to add the base and the exponent
b) When he multiplies exponents, he is supposed to multiply the base and keep the exponents
c) When he multiplies exponents, he is supposed to keep the base and add the exponents if the base is the same
d) None of the above

c)

Step-by-step explanation:

In exponent multiplication, If two numbers have same base, keep the base and add the exponents.

answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.

.24

step-by-step explanation:

the probability is   .24

the first player had the highest probability of getting a silver marble

the game could be made fair by adding back the marble that was drawn after each draw