I got an answer for a problem but I want to know why a 7 was added to the end of it pls help. Question:

In order to have the answer, 3.487×10^-5, you have to make the power of 10 into -5 :

7×10^-8 = 0.007×10^-5

e.g.

1×10^-2 = 0.01

1×10^-4 = 0.01×10^-2

(take note: when the power is negative, you have to move to the left)

Then you can solve it :

0.007×10^-5 + 3.48×10^-5

= 10^-5(0.007 + 3.48)

= 10^-5(3.487)

= 3.487×10^-5

x = central angle apc = measure of minor arc ac

the two angles x and 30 add to 180, so x+30 = 180 and x = 180-30 = 150. the measure of minor arc ac is 150 degrees.

what we need to do from here is find the circumference and then multiply it by x/360 since there are 360 degrees in a circle. in this case, x = 150, so x/360 = 150/360 = 15/36 = 5/12. the shortest distance along the curve from a to c is 5/12 of the distance around the entire circle (aka circumference)

c = circumference

c = pi*d

c = pi*24

c = 24pi

now multiply this by 5/12 to get

distance along minor arc ac = (5/12)*(circumference)

distance along minor arc ac = (5/12)*(24pi)

distance along minor arc ac = 10pi

the formula you can use is

l = (x/360)*pi*d

with

l = length of minor arc

x = central angle

d = diameter

which essentially is the steps we took though a bit differently.

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66answer:

step-by-step explanation: