9 out of Reagan's 15 classmates go to bed at 10 p.m.
As a fraction, this would be 9/15.
To convert a fraction to a decimal, you just divide the numerator by the denominator.
Thus, 9 ÷ 15 = 0.6
To turn a decimal into a percentage, you multiply the decimal by 100, and then add a percentage sign.
0.6 * 100 = 60%
Therefore, 60% of Reagan's classmates go to bed at 10 p.m.
Hope this helps!
Answer:
Step-by-step explanation:
The side of the square base is:
The formula for the surface area of the pyramid is:
The height is cleared in the previous expression:
![h = \sqrt{\frac{4}{9}\cdot \left[\frac{224\,cm^{2}-(8\,cm)^{2}}{8\,cm}\right]^{2}-\frac{1}{4}\cdot (8\,cm)^{2} }](https://tex.z-dn.net/?f=h%20%3D%20%5Csqrt%7B%5Cfrac%7B4%7D%7B9%7D%5Ccdot%20%5Cleft%5B%5Cfrac%7B224%5C%2Ccm%5E%7B2%7D-%288%5C%2Ccm%29%5E%7B2%7D%7D%7B8%5C%2Ccm%7D%5Cright%5D%5E%7B2%7D-%5Cfrac%7B1%7D%7B4%7D%5Ccdot%20%288%5C%2Ccm%29%5E%7B2%7D%20%7D)
The number of triangles is n-2
n= number of sides
8-2= 6 triangles
if applying this you won't have to draw any diagonals to
find the number of triangles just subtract 2 from the number of sides
hope this helps
Answer:
D
Step-by-step explanation:
Answer:
a) $520
b) $580
c) Interest amount is same each year
Step-by-step explanation:
Given - Georgie put $500 in her savings account, earning interest at a rate of 4% each year. She did not make any more deposits or withdrawals.
To find - a) How much money was in the account after one year?
b) How much money was in the account after 4 years?
c) Was the amount of money earned in interest the same or different each year?
Proof -
Here given that,
Principal amount = $500
rate of interest = 4% = 4/100 = 0.04
Now,
a)
Amount = P [ 1 + RT ]
= 500 [ 1 + 0.04(1)]
= 500 [ 1 + 0.04] = 520
⇒Amount = $520
b)
Amount = P [ 1 + RT ]
= 500 [ 1 + 0.04(4)]
= 500 [ 1 + 0.16] = 580
⇒Amount = $580
c)
In 2nd year,
Amount = P [ 1 + RT ]
= 500 [ 1 + 0.04(2)]
= 500 [ 1 + 0.08] = 540
⇒Amount = $540
Now,
Interest in 1st year = 520 - 500 = 20
Interest in 2nd year = 540 - 520 = 20
So,
The interest amount is same each year
