Answer:
4.2 x 10^10
Step-by-step explanation:
2.8 x 10^8 x 1.5 x 10^2 = 4.2 x 10^10
To solve this problem, you must follow the proccedure that is shown below:
1. You need to apply the formula for calculate the perimeter of a circle, which is:
P=2πr
P is the perimeter of the circle (P=9.42 feet).
r is the radius of the circle.
2. Now, you must clear the radius "r" from P=2πr, as below:
P=2πr
r=P/2π
3. When you substitute the values, you obtain:
r=P/2π
r=9.42 feet/2π
r=1.49 feet
4. Now, you can calculate the diameter (D):
D=2r
D=2(1.49 feet)
D=2.98 feet
<span>
What's the diameter of the wheel?
The answer is: </span><span>2.98 feet</span>
Answer:
8 Barbie dolls.
Step-by-step explanation:
For this you can make a equation with addition.
4+x=12
Subtract 4 on both sides:
4-4+x=12-4
x=8
So, she needs 8 barbie dolls.
Answer:
pounds
Step-by-step explanation:
10³ = 10(10)(10) = 1000
4.5(1000) = 4500
4500 grams would be much too small for a car.
4500 tons would be 4500(2000) = 9000000 pounds; this would be much too large for a car.
4500 ounces would be much too small for a car.
4500 pounds, however, is about the right size for a car.
Answer:
SA=64
V=28
Step-by-step explanation:
formula for SA: 2(lw+hw+lh)
formula for volume: l*w*h
where
l-(length)=2
w-(width)=2
h-(height)=7
lets solve for SA first:
2(2*2+2*7+2*7)
2(4+14+14)
2(32)
64
SA=64
now lets solve 4 volume
v=lwh
v=2*2*7
v=28