Answer:
Below in bold.
Step-by-step explanation:
a. h after 4 seconds:
h = -16(4)^2 + 256(4)
= -256 + 1024
= 768 ft
b. When the height is 1008 ft
1008 = -16t^2 + 256t
16t^2 - 256t + 1008 = 0
16(t^2 - 16t + 63) = 0
16(t - 7)(t - 9) = 0
t = 7, 9
So it will take 7 seconds to rise to 1008 feet and and after 9 seconds it will pass 1008 on the way down
So the times are 7, 9 seconds.
c. When the ball reaches the ground h = 0:
-16t^2 + 256t = 0
-16t(t - 16) = 0
t - 16 = 0
t = 16 seconds.
Answer:
A=3(π/2)-1 au
Step-by-step explanation:
we have according to the graph that
f(x)=3
g(x)=cos(x)
Knowing A=∫|f(x)-g(x)|dx, then
; where a=0 and b=π/2

A=(3x-sin(x)) evaluated 0 ≤ x ≤ π/2
A=(3(π/2)-sin(π/2))-(3.0-sin(0))

Answer:
80 square centimeters
Step-by-step explanation:
see the attached figure to better understand the problem
we know that
The total area of the arrow is equal to the area of a rectangle plus the area of a triangle
step 1
Find out the area of the rectangle
The area of rectangle is equal to

we have

substitute

step 2
Find the area of triangle
The area of triangle is equal to

we have

substitute

step 3
The area of the arrow is equal to

substitute the values

Total surface area of cylinder :
[(22/7)(7)²] × 2 ( area for 2 circles )
+
[ 2(22/7)(7) ] ×12 ( circumference of circle × height )
=
836 cm²
i hope my solution helps :))
Answer:
Step-by-step explanation:
4x + 4 - 3
= 4x + 1
Yes they both are equivalent because the algebraic expression is same