10. Keith is in a hot air balloon that is 200 feet above the ground and is ascending 1 1/2 feet per
second. Erica is in a hot air balloon that is 548
feet above the ground and is descending 1 2/5
feet per second. After how many seconds will
the hot air balloons be the same number of feet above the ground.
feet above the ground?
A. 52 seconds
B. 120 seconds
C. 75 seconds
D. 3,480 seconds

i can you answer this question sweetie!

step-by-step explanation:

62.5 paisa

step-by-step explanation:

4000*70 = 280000

280000-(2000*90) = 100000

4000-2400 = 1600

100000/1600 = 62.5

( give brainliest)

hi there!

the answer will be d: 2

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204