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swat32
3 years ago
13

Mrs mastrioni bought a set of 80 stamps she wanted to give all the stamps to her students as a reward she could give equal numbe

rs of stamps to
a 2or 3 students
b 2 or 6 students
c 2,4,5 or 8 students
d 2,4,8 or 9 students
Mathematics
1 answer:
Scilla [17]3 years ago
8 0
C 2,4,5 or 8 because 80 is divisible by all of these numbers
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Who was the first president of the United States
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Answer: George Washington


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If a person can carry 40 pounds, and a group of people want to carry 86 pounds of stuff, how many people are necessary to carry
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3 people

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James has just sold his motorbike for £1,890. He bought the motorbike for £2,700. What fraction of the original cost did he sell
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If a certain cannon is fired from a height of 8.8 meters above the​ ground, at a certain​ angle, the height of the cannonball ab
Dennis_Churaev [7]

Answer:

It would take approximately 6.50 second for the cannonball to strike the ground.

Step-by-step explanation:

Consider the provided function.

h(t)=-4.9t^2+30.5t+8.8

We need to find the time takes for the cannonball to strike the ground.

Substitute h(t) = 0 in above function.

-4.9t^2+30.5t+8.8=0

Multiply both sides by 10.

-49t^2+305t+88=0

For a quadratic equation of the form ax^2+bx+c=0 the solutions are: x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

Substitute a = -49, b = 305 and c=88

t=\frac{-305+\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}=-\frac{-305+\sqrt{110273}}{98}\\t = \frac{-305-\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}= \frac{305+\sqrt{110273}}{98}

Ignore the negative value of t as time can't be a negative number.

Thus,

t=\frac{305+\sqrt{110273}}{98}\approx6.50

Hence, it would take approximately 6.50 second for the cannonball to strike the ground.

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3 years ago
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earnstyle [38]
Answer:
It’s the first one
6 0
3 years ago
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