<span>What is the arc length when Θ=3 pi/5 and the radius is 7 cm?
</span><span>Here are the available answers...
21pi/5 cm
12pi/5 cm
6pi/5 cm
3pi/35 cm
</span>
Given:
arc length = theta * radius
arc length = (3 pi/5)(7cm)
arc length = 21pi/5 cm Answer is the 1st option.
Answer:
c
Step-by-step explanation:
A. 60 people exercise regularly (13 + 47).
60 is 100(60 / 250) = 24% of people.
b. 65 people smoke (13 + 52).
65 is 100(65 / 250) = 26% of people.
Answer:
a) t = 0.54 seconds
b) t = 8 seconds
Step-by-step explanation:
Given in the question the equation
h = 40t - 5t²
<em> where h is height in meters</em>
<em> t is time in seconds</em>
<em />
Time it took to reach 20 meters
20 = 40t - 5t²
-5t² + 40t - 20 = 0
by using quadratic formula for factorisation
<h3>t = (-b± √(b)² - 4(a)(c) ) / 2(a)</h3>
t = 0.54 (upward motion)
or
t = 7.46 (downward motion)
b) Time it took to reach the ground
at ground h = 0
So,
0 = 40t - 5t²
t(40 - 5t ) = 0
t = 0 (at starting point)
or
40 -5t = 0
5t = 40
t = 40 /5
t = 8 seconds
Answer:
C) 3
Step-by-step explanation:
2x-y=3
-4x+2y=-6
4x+3y=11
-4x+2y=-6
4x+3y=11
5y=5
<u>y=1</u>
2x-y=3
2x-1=3
2x=4
<u>x=2</u>
2+1=<em><u>3</u></em>
