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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

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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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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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

HRLP ME PLEASE BRO PLEASE ALL I NEED IS THE ANSWER

earnstyle [38]

Answer:
It’s the first one

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