a hot air balloon is at a height of h feet.
which expressions represent a change in height of 5 ft?
choose exactly two answers that are correct.
a. h/5
b. 5*h
c. h+5
d. h-5
i have more questions do if you are willing to with more than this than let me know.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?