What is the value of the equation?
240÷2^3 * 10 − 20

A. 10 B. 40 C. 280 D. 380

280

Step-by-step explanation:

240/ 2³ x 10 - 20

240/8 × 10 - 20

perform any multiplication or division from left to right

240/ × 10 - 20

30 × 10 - 20

300 - 20

= 280

:D

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.

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction