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andrey2020 [161]
3 years ago
10

PLEASE HELP !!! - after tip you gave a total of $321.75. If the original price of the meal was $300, what percent tip was applie

d for the meal?​
Mathematics
2 answers:
yan [13]3 years ago
8 0

Answer: 7.25%

Step-by-step explanation:

There are a few ways to do this, but the easiest might be to set up a proportion:

321.75/300 = x percent/100 percent

Now cross multiply;

300x = 321.75(100) = 32,175

Divide both sides by 300 to solve for x:

300x/300 = 32,175/300

x = 107.25 This means that the tip was 7.25% on top of the $300 meal.

svlad2 [7]3 years ago
4 0

Answer:

7.25 %

Step-by-step explanation:

The given in the question, after tip the total is $321.75. The original price of a meal is $300.

Calculation,

Step 1: (x/100) * 300 = 21.75

Step 2: Solve for x.

Step 3: 300x = 100 * 21.75

Step 4: x = (21.75 * 100) / 300

Step 5: x = 7.25%

Hence, the percent of tip that was applied for the meal is 7.25.

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a cone has a radius of 6cm and height 9 calculate a)the volume and curved surface area b) total surface area
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Answer:

V = 339.3 cm³; L = 203.9 cm²; A = 317.0 cm²  

Step-by-step explanation:

a) Volume

The formula for the volume (V) of a cone is

V = ⅓πr²h

V = ⅓π × 6² × 9

V = ⅓π × 36 × 9

V = 108π cm³

V ≈ 339.3 cm³

=====

Curved surface area  

The formula for the lateral surface area (L) of a cone is

L = πr√(r² + h²)

L = π×6√(36 + 81)

L = 6π√[9(4 + 9)]

L = 6π√(9 × 13)

L = 18π√13 cm²

L ≈ 203.9 cm²

===============

b) Base surface area

The base is a circle, so the formula for base surface area (B) is

B = πr²

B = π×6²

B = 36π cm²

B ≈ 113.1 cm²

=====

Total surface area

A = L + B

A = 18π√(13 +36π)

A = 18π(2 + √13) cm²

A ≈ 203.9 + 113.1

A ≈ 317.0 cm²

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