4 years ago

Diameter: 17 in Radius: Circumference: What is the circumference of 17inches

Mathematics

1 answer:

Natali [406]4 years ago

3 0

The circumference is 8.5

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3 years ago

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ipn [44]

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3 years ago

The manager of a store orders model railroad sets that cost $390 and sells them for $429. What is the mark-up, as a percentage?

Katarina [22]

Answer:

10%

Step-by-step explanation:

We have been given that the manager of a store orders model railroad sets that cost $390 and sells them for $429.

We will use markup % formula for our given problem.

$\text{Markup percentage}=\frac{\text{Selling price- Cost}}{\text{Cost}}\times 100$

$\text{Markup percentage}=\frac{429-390}{390}\times 100$

$\text{Markup percentage}=\frac{39}{390}\times 100$

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Therefore, markup is 10% of cost.

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3 years ago

3. Simplify log3 20 - log3 5

aalyn [17]

$\log_320-\log_35=\log_3\dfrac{20}{5}=\log_34$

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3 years ago

Simplify (9 + 7i)/(-10 + 8i)

Vera_Pavlovna [14]

Multiply numerator and denominator by the conjugate of the denominator

Denominator: -10 + 8i
Conjugate of the denominator: -10 - 8i

Operation:

[9 +7i] / [-10 + 8i] * [-10 -8i] / [-10 - 8i] = [-90 - 72i - 70i +56] / [100 + 64] =

[-34 -142i] / 164 = [-17 -71i] / 82

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4 years ago