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mezya [45]
2 years ago
10

HELP I NEED THIS DONE ITS DUE TODAY

Mathematics
1 answer:
lakkis [162]2 years ago
6 0

Answer:

A = 4.5E2 * 3.2E6 * 3.65E2 = 4.5 * 3.2 * 3.65 * 10^10

A = 52.6 * 10^10 = 5.3 * 10^11 grams

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2r2 + 3s3 − r2 + 4t2 − r2 if r = −2, s = −3, and t = 5.
Elza [17]

First, simplify the expression 2r^2 + 3s^3 - r^2 + 4t^2 - r^2. Here you have three terms with r^2, group them in the following way:

2r^2 + 3s^3 - r^2 + 4t^2 - r^2=2r^2-r^2-r^2+3s^3+4t^2=(2r^2-r^2-r^2)+3s^3+4t^2=

=r^2(2-1-1)+3s^3+4t^2=3s^3+4t^2.

Then substitute s=-3 and t=5:

3s^3+4t^2=3\cdot (-3)^3+4\cdot 5^2=3\cdot (-27)+4\cdot 25=-81+100=19.

Answer: 19.

3 0
2 years ago
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Calculate the area of the following figure. All measurements are in centimetres. Give answer to correct two decimal places.
kykrilka [37]

Answer:

Step-by-step explanation:

The shape above is a composite shape having two different shapes like rectangle and semi- circle

Area of rectangle=Length × Breadth

Area of semi circle=1/2πr^2

To find the area of the rectangle naw

Length of the rectangle=6.6

Width of the rectangle=4

A=6.6×4

A=26cm^2

Area of semi-circle=1/2

Diameter of the shape =4cm

Radius=2cm

A=1/2×3.14×2cm x2cm

A=6.28cm^2

Area of the shape=26+6.28cm^2

Area=32.28 to 2 dp

3 0
2 years ago
If f(x) = –3x + 3, then f-1 (x) =<br> ??
Elden [556K]

Answer: x equals 5

Step-by-step explanation:

6 0
3 years ago
Becky bought a magazine for $3.68, and the sales tax was 8.25%. How much sales tax did Becky pay on the magazine?
Lerok [7]

Answer:

$0.30

Step-by-step explanation:

3.68*.0825= .3036

3 0
2 years ago
WILL GIVE BRAINLIEST ANSWER TO WHOEVER ANSWERS FIRST AND CORRECT
Daniel [21]

Answer:

The answer is -2.5.

Step-by-step explanation:

This is because the distance between -9 and 4 is 14 units. And the two numbers in the middle are -3 and -2, so -3 plus -2 equal -5 and -5 divided by 2 equals -2.5.

7 0
3 years ago
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