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Lorico [155]
3 years ago
14

I need help with a MathsWatch question!

Mathematics
2 answers:
KIM [24]3 years ago
6 0
To find the area of a circle, you do π × diameter (in this case 10). They have told you to use 3.142 as π, so you do 3.142 × 10 = 31.42. Because it's a semi-circle, you need to halve 31.42 to get 16.21, which is the answer
yuradex [85]3 years ago
6 0
A = \pi x r²
A = 3.142 x 5²
A = 9818.75

Semicircle
9818.75 / 2 = 4909.38
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Andre and Elena are each saving money. Andre starts with $100 in his savings account and adds $5 per week. Elena starts with $10
Tomtit [17]

Answer:

Andre have more money after 4 weeks and after 6 week they have same amount of money.

Step-by-step explanation:

When Andre =100 then Elena =10.

After 4 week,

Andre = 100+(5*4)=100+20=120

In this time Elena = 10+(20*4) =10+80 = 90

After more 2months Andre have more 5+5=10

Then his total balance will be 120+10=130.

Than Elena after 2 week have 20+20=40.

Then her total balance will be 90+40=130.

That's mean 4 weeks+ extra 2 weeks total 6 weeks

6 0
3 years ago
Read 2 more answers
Jake volunteers to help out his younger brother's basketball team in his free time. One of his tasks is to ensure that all the b
Aneli [31]

Answer:

The volume is 2140.98 inches³

Step-by-step explanation

The basketballs are spherical, and it is known that the volume of a sphere is

V = \frac{4}{3}\pi r^{3}

Where V is the volume of the ball and r is its radius


They tell us that the ball measures 8.8 inches wide. This means that its diameter is 8.8 inches.

It is known that the radius of a sphere is equal to half its diameter.

Therefore, the radius r of the ball is:

r = \frac{8.8}{2}

r = 4.4 inches.

Then, they tell us to consider that the walls of the ball are infinitely thin, which means that we should not take into account their thickness in the calculation of the volume.

We already have all the data we need, now we proceed to calculate the volume.

V = \frac{4}{3}\pi(4.4)^{3}\\V = 356.83 inches^{3}

Where V is the volume of only one of the balls

The volume of the six balls is V = 6 * 356.83 = 2140.98 inches³

Finally the volume is 2140.98 inches³

4 0
3 years ago
Read 2 more answers
The parent function of the function g(x) = (x - 5)2 + k is f(x) = x2. The vertex of the function g(x) is located at (9,-8).
likoan [24]

Answer:

h = 5 and k = -8.

Step-by-step explanation:

The parent equation is f(x) = x², which is the equation of a parabola having the vertex at point (0,0).

The original equation is given by g(x) = (x - 5)² + k, ⇒ y = (x - 5)² + k

⇒ y - k = (x - 5)²

So, the vertex of the original equation is at (5, k) which is given to be (5, -8)

Therefore, h = 5 and k = -8. (Answer)

6 0
4 years ago
Mr. Jones teaches 154 students in 7 classes. How many
ArbitrLikvidat [17]
154 divided by 7 i think

so 22 students per class

Mr. Jones has 22 students per class
6 0
4 years ago
What is the slope intercept equation for a parallel line through (1,3), parallel to y=2x+5
Daniel [21]

Answer:

the desired line is y = 2x+1

Step-by-step explanation:

A line parallel to y=2x+5 has a very similar equation.  All we have to do here is to write y=2x+5 as y=2x+b and find b for x = 1 and y = 3.

Replacing y with 3 and x with 1, we get 3 = 2(1) + b.  Then b = 1, and the desired line is y = 2x+1

7 0
3 years ago
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