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guapka [62]
3 years ago
10

What is the cost of a comic book after it has been marked up 20% if it costs $3.95

Mathematics
1 answer:
Leviafan [203]3 years ago
6 0
3.95 / 100 = 0.0395
0.0395 times 20 (the %) = 79 cents
79 + 3.95 = 4.74
$4.74
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A father is now twice as old as his son. If the sum of their ages ten years ago was fifty two, how old are they today?​
Oliga [24]

Answer:

24 and 48

Today, the son is 24 years old, and the father is 48 years old.  

Step-by-step explanation:

(x - 10) + (2x - 10) = 52

3x + 20 = 52

3x = 72

x = 24

The father is 2 times his son's age.

2x

= 2(24)

= 48

So, the son is 24 and the father is 48.

10 years ago, son was 14 and father was 38, if added, this adds up to 52, so we know our calculations are correct.

3 0
3 years ago
Read 2 more answers
A) work out the radius of the mercury, giving your answer as an ordinary number
guapka [62]

Answer:

a. 2,440 km

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Step-by-step explanation:

a. Diameter of Mercury = 4.88*10^3

Radius of Mercury = ½ of its diameter = \frac{4.88*10^3}{2}

Radius of Mercury = 2.44*10^3

To convert the radius to ordinary number, multiply 2.44 by 1,000.

Radius of Mercury as an ordinary number = 2.44*1,000 = 2,440 km

b. Mass of Jupiter = 1.898*10^{27} kg

Mass of Saturn = 5.68*10^{26} kg

Difference between mass of Jupiter and mass of Saturn = 1.898*10^{27} - 5.68*10^{26} (subtract 5.68 from 1.898 = 5.68. we would retain the largest exponent, which is raised to the lower of 27.)

= 1.33*10^{27}

7 0
3 years ago
Please help me! Im so confused. If you could explain, too that would be great!!! <3
Zielflug [23.3K]

Answer:

the base length is 8 units

Step-by-step explanation:

You can use pythagorean theorem to solve this

8 0
2 years ago
Denzel had $88. He spent $13 on a baseball cap. Then he earned $22 babysitting.
djverab [1.8K]
97 is your answer

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3 years ago
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ss7ja [257]

Answer:

x=82

Step-by-step explanation:

8 0
3 years ago
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