Answer:
4620 feet per minute
Step-by-step explanation:
210m/ 4h ( 1h/ 60 min) (5280ft/ 1m)
1108800ft/240 min
= 4620 feet per minute
eight hundred an fourty
2.4x+2.9
Work Shown:
f(x) = 4x^(-2) + (1/4)x^2 + 4
f ' (x) = 4*(-2)x^(-3) + (1/4)*2x .... power rule
f ' (x) = -8x^(-3) + (1/2)x
f ' (2) = -8(2)^(-3) + (1/2)*(2)
f ' (2) = 0
90
$12.15
