Answer:

Step-by-step explanation:
we know that
The surface area of a sphere is equal to

we have

substitute


yes sure, i learned this before so
1. a. make a proportion here, of percentage.
if you cross multiply and divide you get 90%.
1. b. obviously the empty seats would be 10%.
2. a. proportion again,
cross multiply then divide you ge 15%
3. 30% in decimal form is 0.3. multiply it then to the total amount, so 0.3 x 15 = 4.5
-2x + 6 - 13x + 16
= -15x + 22
You will have $5 left because if you spend 1.25 on 12 snacks you will spend $15
Prime numbers 2,3,5,7,11,13,17,19,23
so 2+3+5=10 no
3+5+7=15 no
3+5+11=19 Yes this is your answer