4 quarts are in a single gallon
Not so sure about the second one, but the first one is pretty simple:
The area of a circle = pi x radius^2
Since you need to find the area of the entire dvd, I'm assuming they mean if the hole in the center wasn't there, so add that to the diameter.
12+1.5 = 13.5
Half of the diameter is the radius, so half of 13.5 = 6.75
Now, multiply pi (3.14) by the radius, but have the radius squared. You'd write the equation like this:
3.14 x 6.75^2 (or on paper, the ^2 would be a small two diagonal from the 5)
Actual answer: 143.06625
You can round that to 143.
Answer:
liz read 50 pages in one hour
Step-by-step explanation:
Answer:
m∠a = 100°
m∠b = 105°
m∠c = 25°
Step-by-step explanation:
The line intersecting the triangle is parallel to the base of the triangle.
The intersecting line has created an additional smaller triangle (to the right of the diagram) which is similar to the larger triangle.
Therefore, the interior angles of the base of the smaller triangle are the same as the interior angles of the base of the original, larger triangle.
So the supplementary angle adjacent to ∠a will be 80°.
Similarly, the supplementary angle adjacent to ∠b will be 75°.
The sum of angles on a straight line is 180°
Therefore, m∠a = 180 - 80 = 100°
and, m∠b = 180 - 75 = 105°
The sum of interior angles of a triangle = 180°
Therefore, to determine m∠c, simply subtract 80° and 75° from 180°:
⇒ m∠c = 180 - 80 - 75 = 25°
Answer:
x=67.5
Step-by-step explanation:
The interior angles of a triangle add up to 180. therefore
45+x+x=180
2x=135
x=67.5