A science teacher presented a balloon to his class, and posed the question, "If I keep this balloon in the freezer overnight, what will occur?" He followed up with, "How certain are you of your answer?" The
teacher recorded his students' responses.
Certain Uncertain
Shrink
5
7
Stay the same
11
15
Expand
4
4
What is the probability that a randomly selected student believes the balloon will expand or was certain?
Simplify any fractions.
Submit​

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.

the answer is 21%.

if i put something wrong your not gonna like it so rather not say nothing.

inch

step-by-step explanation:

yard and mile are too big.