Answer:
135 times
Step-by-step explanation:
450/100% = 4.5
4.5 x 30 = 135
150
just divide 450 by a 30 percent
Answer: $29
Step-by-step explanation: 12+10+7= 29
what we have to find in this question
210 beats
28 beats per 4 seconds
28 ÷ 4 = 7
7 beats per second
7 beats · 30 seconds
= 210 beats