A 120 watt light-bulb is a 0.120 kilowatt light bulb.
In one hour, it uses 0.120 kilowatt-hour of energy.
If electrical energy costs $0.20 per kilowatt hour, then that light bulb costs
(0.120 kilowatt-hour / hour) x (0.20 dollar / kilowatt-hour) =
(0.120 x $0.20 / hour) =
$0.024 / hour = <span>2.4¢ per hour </span>
For each question we must apply the Pythagorean theorem and clear the value of x.
question 5
x = root (14 ^ 2 + 16 ^ 2)
x = root (452)
x = 2raiz (113)
question 6
x = root (8 ^ 2 + 15 ^ 2)
x = 17
question 7
x = root (12 ^ 2 + 12 ^ 2)
x = root (2 * (12 ^ 2))
x = 12raiz (2)
question 8
x = root (18 ^ 2 - 9 ^ 2)
x = root (243)
x = 9raiz (3)
Answer:
The area of Nancy's garden is ![16\frac{7}{8}\ yd^{2}](https://tex.z-dn.net/?f=16%5Cfrac%7B7%7D%7B8%7D%5C%20yd%5E%7B2%7D)
Step-by-step explanation:
I assume that the Nancy's garden is a rectangle shape
To find the area first convert mixed number to an improper fraction
![4\frac{1}{2}\ yd=\frac{4*2+1}{2}=\frac{9}{2}\ yd](https://tex.z-dn.net/?f=4%5Cfrac%7B1%7D%7B2%7D%5C%20yd%3D%5Cfrac%7B4%2A2%2B1%7D%7B2%7D%3D%5Cfrac%7B9%7D%7B2%7D%5C%20yd)
![3\frac{3}{4}\ yd=\frac{3*4+3}{4}=\frac{15}{4}\ yd](https://tex.z-dn.net/?f=3%5Cfrac%7B3%7D%7B4%7D%5C%20yd%3D%5Cfrac%7B3%2A4%2B3%7D%7B4%7D%3D%5Cfrac%7B15%7D%7B4%7D%5C%20yd)
Therefore
The area is equal to
![A=\frac{9}{2}*\frac{15}{4}=\frac{135}{8}\ yd^{2}](https://tex.z-dn.net/?f=A%3D%5Cfrac%7B9%7D%7B2%7D%2A%5Cfrac%7B15%7D%7B4%7D%3D%5Cfrac%7B135%7D%7B8%7D%5C%20yd%5E%7B2%7D)
convert to mixed number
![\frac{135}{8}\ yd^{2=\frac{128}{8}+\frac{7}{8}=16\frac{7}{8}\ yd^{2}](https://tex.z-dn.net/?f=%5Cfrac%7B135%7D%7B8%7D%5C%20yd%5E%7B2%3D%5Cfrac%7B128%7D%7B8%7D%2B%5Cfrac%7B7%7D%7B8%7D%3D16%5Cfrac%7B7%7D%7B8%7D%5C%20yd%5E%7B2%7D)
Number 10 equals C. 31.5 ounces
Number 11 equals D. 0.06 mile
Answer:
141.37 cm^3
Step-by-step explanation:
The volume of the hemisphere is 56.55 and the volume of the cone is 84.82. add them