Step-by-step explanation:
8x°+30°=110°( vertically opposite angles)
8x°=110°-30°
8x°=80°
8x°/8=80°/8
x°=10°
<span>first, we are going to define variables as the following:
a = 0
a = π/2
n = 4 rectangles
Δx = [ b - a ] / n ------>Δx = [ π/2 - 0 ] / 4 = π/8
right endpoints :
sum( seq( 4 cos(x) * π/8 , x , 0+π/8 , π/2 , π/8 ) ) = 3.163065 underestimate
left endpoints:
sum( seq( 4 cos(x) * π/8 , x , 0 , π/2-(π/8) , π/8 ) ) = 4.733861 overestimate
the reason because the actual estimate by integral as the following:
π/2
∫ 4cos(x) dx = 4
0</span>
<span>
First, do the parentheses.
Now do the division.
Finally, do the addition.
</span>
-- A fraction always means division.
To change a fraction to its decimal form, DO the division.
3/5 = 3 ÷ 5 = 0.6
-- To change a decimal to percent,
move the decimal point 2 places that way ===> .
0.6 = 60%
Answer:
the answer is -77/8 or -9.625
Step-by-step explanation: