Hi there!
The formula to find the are of a circle is :
a = 
r²
The formula to find the circumference of a circle is :
c = 2r
In order to use the area formula, you need to figure out what the radius (r) is.
If we solve for "r" in the circumference equation, we have :
r = c ÷ (2)
Now we use this to replace "r" in the area formula :
a = ( c ÷ (2))²
When we simplify this we get :
a = c² ÷ 4
Now you can put your value of "c" into this equation and find "a".
*Remember, is about 3.1416.
Solving for "a" :
a = c² ÷ 4
a = 28² ÷ 4
28² = 28 × 28 = 784
a = 784 ÷ 4
4 = 4 × = 12.56637061435917
a = 784 ÷ 12.56637061435917
a = 62.38873769202297cm²
You need to round to the nearest square centimeter, which means that you need to round to the nearest whole number :
a = 62cm²
There you go! I really hope this helped, if there's anything just let me know! :)
Answer:
ok good job
Step-by-step explanation:
Answer:
For Review: Planning Ahead and Contracts Quick Check... these are the answers...
1) B. Yes, you want to begin saving at least 25 years before you plan to retire
2) D. all of the above
3) $2,341.27 per month realized income
4) Your housing and fixed expenses are $702.38 per month do you want to have a four month emergency fund and save it over a nine month period of time how much do you need to save per month?
Answer #4) $312.17 /month
Step-by-step explanation:
702.38 * 4 = 2,809.52 How much you will need to save for 4 months worth or expenses.
Now divide by 9 because that is how many months you will take to save up...
2,809.52 / 9 = 312.17
Answer) $312.17 per month, for 9 months to save 4 months worth or expenses.
Answer:
1/2 + 8 is equivalent to 1/2 - (-8)
0.5 - (-8) is ALSO equivalent to 1/2 - (-8)
0.5 + 8 is another equation that is equivalent to 1/2 - (-8)
Step-by-step explanation:
