Answer:
R(p) = -4p^2 + 300p when p=20.
R(p) = -4(20)^2 + 300(20)
R(p) = -1600 + 6000
R(p) = 4400
The mass when p=20 years is 4400.
Answer:
Alexis is 152.4 centimeters tall
First you need to divide ₹134 by 12 to find the cost of each pen.

Multiply the cost of each pen by 5 to find the cost of 5 pens.

≈ ₹55.8 (correct to 1 decimal place)
Follow pemdas
2+(1/2) +34- (1/10)
2.5 + 34 - .1
36.5-.1
36.4