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nadezda [96]
3 years ago
11

PLZ HELP ILL GIVE BRAINLIEST FOR RIGHT ANSWER!!!

Mathematics
2 answers:
Marianna [84]3 years ago
8 0

Answer:

4

Step-by-step explanation:

the answer is 4 because 2 people studied 4 hours, 1 person studied 4.5 hours and one person studied 8.5 (they are insane) which would total to 4 people studying for at least 4 hours.

Plz mark brainliest

GREYUIT [131]3 years ago
4 0
3 students because at least means 4 or more. since 2 students studied 4 hours and one studied 5, 3 students studied at least 4 hours
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Perrie invests £25000 for 3 years in a saving account. She gets 2.7% per annum compound interest. Calculate the total amount of
aleksandr82 [10.1K]

Answer:

I (interest) = £ 2,080.17

Step-by-step explanation:

Perrie invests £25000 for 3 years in a saving account. She gets 2.7% per annum compound interest. Calculate the total amount of interest perrie will get after 3 years.

To solve the above question, we would use the Periodic compound interest formula

A = P(1 + r) ^t

Where P = Principal = £25000

r = Interest rate = 2.7 % = 0.027

t = time in years = 3 years

Hence:

A = £25,000( 1 + 0.027)³

A = £27,080.17

A = P + I where

P (principal) = £ 25,000.00

I (interest) = £27,080.17 - £ 25,000.00

I (interest) = £ 2,080.17

The total amount of interest perrie will get after 3 years is £ 2,080.17

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2 years ago
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Answer:

Step-by-step explanation:

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3 years ago
- 4y - 4+ (-3)<br> Combine like terms
rusak2 [61]

Answer:

-4y -7  

Step-by-step explanation:

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Read 2 more answers
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kifflom [539]
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3 0
3 years ago
All of the edges of a regular triangular pyramid have length 12. A frustum of the pyramid has height half of that of the pyramid
vlada-n [284]

Answer:

1) The volume of the frustum is 27·(√3)·h

2) The surface area the frustum is 24·h + 54·√3

Step-by-step explanation:

1) A frustum of the regular triangular prism is a portion of the triangular prism

The length of the edge of the triangle prism = 12

The area of the triangular face, A = (√3/4)·a²

∴ A = (√3/4)·12² = 36·√3

When

The volume of the triangular prism, V = A·h = (36·√3)·h

By triangle proportionality theorem, the cross sectional area of the top half of the triangular prism =  (√3/4)·6² = 9·(√3)

The volume of the top half, V₂ = 9·(√3)·h

The volume of the frustum = V - V₂ = (36·√3)·h - 9·(√3)·h = 27·(√3)·h

The volume of the frustum = 27·(√3)·h

2) The surface area of the triangular side of the frustum is given as follows;

A = 36·√3- 9·(√3) = 27·(√3)

The surface area the frustum, F_A = 2×27·(√3) + 2 ×6 ×h + 12×h = 24·h + 54·√3

The surface area the frustum = 24·h + 54·√3

4 0
3 years ago
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