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Art [367]
3 years ago
11

Evaluate (7.1x 10³)+(4.6 x 10⁶)² Give your answer in standard form to 3SF​

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0

Answer:

2.12x10^13 is what I got

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I need help on questions 48 49 and 50 and u need to find the surface area of the 3 polyhedras please and thank you!
White raven [17]

48. The surface area of a cylinder is given by

... A = 2πr² + 2πrh = 2πr(r+h)

For r = 13 mi and h = 7 mi, this becomes

... A = 2π(13 mi)(13 mi + 7 mi) = 520π mi²

The surface area of the cylinder is 520π mi² ≈ 1634 mi².

49. The surface area of a rectangular prism is

... A = 2(LW + H(L+W))

For L = 20 m, W = 10 m, H = 7 m, this becomes

... A = 2((20 m)(10 m) + (7 m)(20 m + 10 m)) = 2(200 m² + 210 m²) = 820 m²

The surface area of the prism is 820 m².

50. The formula is the same as for problem 48.

For r = 10 m and h = 13 m, this becomes

... A = 2π(10 m)(10 m + 13 m) = 460π m² ≈ 1445 m²

The surface area of the cylinder is 460π m² ≈ 1445 m².

_____

When calculations are repetitive, it is convenient to let a calculator or spreadsheet do them.

7 0
3 years ago
What is the quadratic equation of the curve of best fit shown below
Kisachek [45]
First off, we know that the y-interecept is 2, so there is going to be a plus two in the final equation. Now with the two answers input the number 8 to see which will output 6.

6 = 1/12(8)^(2) + 2
6 = 1/12(64) + 2
6 = 64/12 + 2
6 = 16/3 + 6/3
6 does not equal 22/3

6 = 1/16(8)^(2) + 2
6 = 1/12(64) + 2
6 = 64/16 + 2
6 = 4 + 2
6 = 6
This means that y = 1/16 x^2 + 2 is the correct answer. I hope that helps!
4 0
3 years ago
£360 is shared between Chloe and Denesh. The ratio Abby gets to the ratio Ben gets us 2:7 Chloe and denesh each get 1:5 times th
andreev551 [17]

Answer:

£210

Step-by-step explanation:

I think i just worked it out in my head

6 0
3 years ago
Read 2 more answers
The area of a triangle is the product of the base of the triangle times the height of the triangle, divided by two.
Natali [406]

Answer:

A = (1/2)(base)(height)

Step-by-step explanation:

Yes, that's correct:

A = (1/2)(base)(height)

Was there more to this question?

3 0
3 years ago
Can you have me pl4s
vladimir2022 [97]
The answer to this delightful exsubruent question is 5
6 0
2 years ago
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