I tried to read this I only see the last set . So I can’t answer it I only see half of the question
Answer:
3.77 rounded is 3.8
Step-by-step explanation:
0=-4.9t^2+70
+4.9t^2
4.9t^2=70
divided by 4.9 on (both 4.9 and 70)
t^2=squareroot 14.285= 3.77
Answer: 12πins.
Step-by-step explanation:
Since the area if a circle = πr²
From the question
Area of the circle = 36πins²
To find the circumference of the circle, we need to find the common radius of the circle and this could be achieved from the area of the circle given above.
πr² = 36π, solving this gives. Divide through by π
r² = 36
r = +/-√36
= +/-6
Now to find the circumference of the circle, we substitute for r in the formula below.
Circumstances = 2πr
= 2 ×π × 6
= 12πins.
Since PQ // BC, ABC and APQ are similar triangles, so we can use the Thales theorem
AB / AP = AC / x it means 9/3 = x + 20/ x because AB=6+3=9
3= x+20) /x implies 3x = x +20, and 2x = 20, finally x= 20/2=10
x= 10