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3 years ago

If you are driving 60km/h and you speed up to 70km/h over a period of 5 seconds, what is

Mathematics

2 answers:

lbvjy [14]3 years ago

8 0

Answer:

Step-by-step explanation:

solution:

Data,

driving speed of car intially velocity at = Vi = 60km/h

the speed was then raised to final velocity at = Vf = 70km/h

the total period of speed raised = t = 5 sec

Req, acceleration = ?

put the formulae : a = Vf - Vi/t

a = 70 - 60/5

a =<em> 2 m/sec2 ans</em>

/ means divided by,

quester [9]3 years ago

5 0

Answer:

fast as heck 0.o (i think 170

Step-by-step explanation:

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the intake pipe can fill a certain tank in 6 hours when the outlet pipe is closed, but with the outlet pipe open it takes 9 hour

Leona [35]

The outlet pipe will take 18 hours to empty the tank.

St<u>ep-by-step explanation:</u>

Number of hours taken by inlet pipe to fill the tank=6

work done by the inlet pipe in 1 hour=1/6

Number of hours taken by the inlet pipe to fill the tank with the outlet pipe open=9

work done by the inlet pipe in 1 hour with outlet pipe open=1/9

we have to determine the time taken by the outlet pipe to empty the tank

The inlet and outlet pipe does the opposite work.

$\\time\ taken\ by\ the\ outlet\ pipe\ to\ empty\ the\ tank=x\\work\ done\ by\ the\ outlet\ pipe\ in\ 1\ hour=1/x\\(1/6-1/x)9=1\\1/6-1/x=1/9\\1/x=1/6-1/9=3/54\\x=54/3=18$

The outlet pipe takes 18 hours to empty the tank.

6 0

3 years ago

What is 1 over 8 converted into a decimal?

bearhunter [10]

1/8 into a decimal is 0.125.

3 0

3 years ago

A triangle has two sides measuring 16 and 21. The included angle is 116°. What is the length of the side opposite the 116° angle

Crank

Answer:

Length of the side opposite to angle $116^{\circ}$ is 31.49

Step-by-step explanation:

Included angle can be defined as the angle in between two sides of the triangle.

So angle $116^{\circ}$ is in between sides 16 and 21.

Refer to the attachment for triangle diagram.

To find the length of opposite side, use cosine rule as follows

$a^{2}=b^{2}+c^{2}-2\:b\:c\cos\left(A\right)$

From the diagram, $b = 21,c = 16,\angle A=116^{\circ}$

Substituting the values in the formula,

$a^{2}=\left(21\right)^{2}+\left(16\right)^{2}-2\left(21\right)\left(16\right)\cos\left(116\right)$

Simplifying,

$a^{2}=441+256-225792\left(-0.44\right)$

$a^{2}=991.59$

Taking square root on both sides,

$\sqrt{a^{2}}=\sqrt{991.59}$

$a=31.49$

Therefore length of third side is 31.49

7 0

3 years ago

Megan and noah were splitting nachos. Megan ate 1/4 of the nachos and noah ate 5/12 of the nachps. What fraction of the nachos d

VladimirAG [237]

Answer:

3/5

Step-by-step explanation:

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3 years ago

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miskamm [114]

i know the answer to 1 is 10

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3 years ago