The correct answers are:
A) 5 minutes, 7 balloons;
B) 1.4 balloons/minute;
C) 14 balloons.
Explanation:
A) He makes 36 sculptures in 180 minutes. To find the number of minutes to make 1 sculpture, divide by 36: [tex] \frac{180}{36} [/tex]=5. He uses 252 balloons to make 36 sculptures. To find the number of balloons in 1 sculpture, divide by 36: [
tex] \frac{252}{36} [/tex]=7.
B) He uses 7 balloons in 5 minutes. A unit rate is a rate where the denominator is 1; to find this, divide: [tex] \frac{7}{5} [/tex]=1.4 balloons/minute.
C) Since he uses 1.4 balloons per minute, multiply by 10 to find the number of balloons in 10 minutes: 1.4 balloons/min *10 min = 14 balloons
