Answer:
69.1 cm (nearest tenth)
Step-by-step explanation:
Circumference of circle= 2πr, where r is the radius.
Given that r= 11 cm,
circumference of the circle
= 2(π)(11)
= 22π
= 69.1 cm (nearest tenth)
Answer:
t=6
Step-by-step explanation:
ground height = 0
(are you sure your formula is correct? isn't it - 16t²?)
if h=16t² +64t+192 is true then
16t² +64t+192 = 0
t² + 4t + 12 = 0
t = (-4 ± √(4² - 4*12)) / 2*1 = (-4 ± √-32) / 2 = -2 ± 2√-2
There is no solution of t
if it is h= - 16t² +64t+192
0 =- 16t² + 64t + 192
t² - 4t - 12 = 0
(t + 2) (t -6) = 0
t should be positive
t = 6 sec
Answer:
-2. 9
Step-by-step explanation:
-5. 8/2 is -2. 9
( just sub 1. 6 from 7. 4 and put negative sign and divide by 2)
