There are 15 risers in a set of stairs running from the basement to the first floor. Each riser is 7 1/4" high. What is the distance between floors?

This is equivalent to 9 ft + 0.75 of an inch, or 9 ft + 3/4 of an inch

Work Shown:

7 & 1/4 = 7.25

Each riser is 7.25 inches tall

15 of them gives a total height of 15*7.25 = 108.75 inches

Divide that by 12 to convert to feet

108.75/12 = 9.0625 feet

9.0625 ft = 9 ft + 0.0625 ft

9.0625 ft = 9 ft + (0.0625 ft)*(12 inches/1 ft)

9.0625 ft = 9 ft + 0.75 inches

9.0625 ft = 9 ft + 3/4 of an inch

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

the correct answer is d

hope this