3 years ago

Adison earned $25 mowing her neighbors lawn. Then she loaned her friend $18 and her granfmother gave her $50 for her birthday. S

he now has $86. How much money did she start with

Mathematics

1 answer:

Soloha48 [4]3 years ago

7 0

$86 = x + 25 - 18 + 50 \\ x = 29$

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An arc subtends a central and measuring pi/2 radians.

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Answer:

1/4th

Step-by-step explanation:

This comes from knowing the unit circle in both radians and degrees. However, you could also calculate it from knowing that 360 degrees is 2 $\pi$ radians. What you'll find is that $\frac{\pi }{2}$ radians is 90 degrees, or 1/4th of the circle. This means that an arc measuring $\frac{\pi }{2}$ radians will be 1/4th of the entire circumference.