Answer:
Option C) -cosu is correct
Therefore the simplified expression is
Step-by-step explanation:
Given expression is
To find the value of the given expression :
By using the formula
Substitute A=u and in the above formula we get
( here
and
)
Therefore option C) -cosu is correct
Therefore the simplified expression is
Answer:
Length = 54 ft.
Width = 50 ft.
Step-by-step explanation:
Let the width of the rectangle be 'w'.
According to question ,
Length = w + 4
Perimeter = 208 ft.
We know that where l = length & w = width
So,
Width = 50 ft.
=> Length = 50 + 4 = 54 ft.
Answer:
0.18 sec or 3.4 sec.
For second part, it will take 3.7 sec.
First part:
Set h(t) = 17and solve for t.
-16t²+ 58t + 7= 17
-16t² + 58t - 10 = 0
Solve this quadratic equation for t. You should get 2 positive solutions. The lower value is the time to reach 17 on the way up, and the higher value is the time to reach 17 again, on the way down.
Second part:
Set h(t) = 0 and solve the resulting quadratic equation for t. You should get a negative solution (which you can discard), and a positive solution. The latter is your answer.
