6. $1,470
7. $7.88
8. $11.12
9. (dont hold me on it) 4.5522581%
Answer:
r = 16 units
Step-by-step explanation:
From the figure attached,
AB is the tangent drawn from a point A to the circle C.
BC = r [Radius of the circle]
Length of AC = (18 + r)
AB = 30
By the property of a tangent drawn to a circle,
"Radius of a circle and tangent are perpendicular to each other"
AB ⊥ BC
By applying Pythagoras theorem in ΔABC,
AB² + BC² = AC²
(30)² + r² = (r + 18)²
900 + r² = r² + 36r + 324
36r = 900 - 324
r =
r = 16 units
<span>Step 1: find the radius
The radius is half of the diameter. So the radius is 8 because the diameter is 16.
Step 2: square the radius.
8^2 = 64
Step 3: plug into formula
pi * radius squared * height
3.14 * (64) * (1.8) = 361.728 m^3
The volume of the pool is 361. 728 meters cubed.
Step 4: Divide volume by the amount pumped out per hour
volume / amount pumped out = amount of hours
361.728/16 = 22.608 hours.
So your answer is approximately 23 hours.</span><span>
</span>
Answer:
30 × 8.8 = 30 × (8 + 0.8) = 240 + 24 = 264
Step-by-step explanation:
I want to buy 30 calculators that cost $ 8.80 each.
So, to calculate the total price, we have to multiply 8.8 with 30.
Now, we have to calculate this multiplication mentally.
To do this, we can write the multiplication as 30(8 + 0.8).
So, we can separately multiply 30 with 8 and calculate it mentally to be 240 and then multiply 30 with 0.8 and calculate it mentally to be 24 and finally add the two products.
Therefore, 30 × 8.8 = 240 + 24 = 264 (Answer)
What are you trying to solve for?