According to short multiplication formula - different of squares:
a² − b² = (a − b)(a + b)
<h3>16a² - 81 = (4a)² - 9² = (4a - 9)(4a + 9)</h3>
The approximate width of Alice's backyard is 22.36 in.
Let l be the length of the rectangle and w be the width.
l = 2w
A = 1000 m2 = l*w
1000 m2 = 2w *w
500 m2 = w^2
√500 m2 = √w^2
w = <span>22.360679775 in or 22.36 in</span>
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8a
TSA = 2πrh + 2<span>πr^2
</span>TSA = 471 + 157 (or 150π + 50π)
TSA = 628 cm^2 (or 200π)
8b
628 x $3 = $1884
cost = $1884
8c.
V = πr^2h = π 5^ 5 (15) = 375π (or 1177.5 if use π = 3.14)
It looks like 60 degrees!!
Answer:
x=132°
Step-by-step explanation:
All four angles should add up to 360°
65°+86°+77°+x=360°
x=132°