Answer:
The diameter will increase at a rate of 1/30π cm/min
Step-by-step explanation:
Here we want to calculate the rate at which the diameter will increase
Mathematically, the area of a sphere is given as;
A = 4πr^2
But r = d/2
so A = 4 * π * d/2 * d/2 = πd^2
dA/d(d) = 2πd
Thus dd/dA = 1/2πd = 1/2 * π * 15 = 1/30π
Given dA/dt = 10
Mathematically;
d(d)/dt = d(d)/dA * dA/dt
dd/dt = 1/30π * 10 = 10/30π = 1/3π cm/min
Add the bases together, divide that by 2 then multiply by the height.
15.8 + 21.8 = 37.6
37.6/2 = 18.8
18.8 x 11.7 = 219.96 yd^2
I think the answer will be (-4,3)
I'm pretty sure the answer is 24
Answer:
The correct answer is Pete saves $2.10 by buying bulbs in packages of 3 for $6.39 each.
Step-by-step explanation:
Pete can buy daffodil bulbs in packages of 3 for $6.39 or in packages of 2 for $4.40.
He needs to buy 30 bulbs at a better price.
Money spent by buying bulbs in packs of 3 = 10 × 6.39 = $63.90.
Money spent by buying bulbs in packs of 2 = 15 × 4.40 = $66.
Money saved if bought in packs of 3 = 66 - 63.90 = $ 2.10.
Thus Pete should buy 30 daffodil bulbs in packages of 3 and save $2.10.
