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AURORKA [14]
3 years ago
12

Ravi drove 871 miles in 13 hours.

Mathematics
2 answers:
Wittaler [7]3 years ago
4 0

Answer:

11

Step-by-step explanation:

871/13 = 737/x

871x = 9581

x = 11 hours

Have a nice day. ^^

professor190 [17]3 years ago
3 0

Answer:11 hours

Step-by-step explanation:

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The equation sin (25 degree) equals StartFraction 9 Over c EndFraction can be used to find the length of Line segment A B.
Bumek [7]

Answer:

AB = 21.3

Step-by-step explanation:

Given

\sin(25) = \frac{9}{c}

See attachment

Required

Find AB

We have:

\sin(25) = \frac{9}{c}

Make c the subject

c = \frac{9}{\sin(25)}

c = 21.3

From the attached triangle;

AB = c = 21.3

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8 0
3 years ago
A Cepheid variable star is a star whose brightness alternately increases and decreases. Suppose that Cephei Joe is a star for wh
4vir4ik [10]

Answer:

\dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi t}{5.3})

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Step-by-step explanation:

According to the question the mathematical model should be

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Differentiating with respect to time we get

B'(t)=0.35\cos(\dfrac{2\pi t}{5.3})\times(\dfrac{2\pi}{5.3})\\\Rightarrow B'(t)=\dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi t}{5.3})

So, the rate of change of brightness after t days is \dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi t}{5.3})

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B'(1)=\dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi\times 1}{5.3})\\\Rightarrow B'(1)=0.16

The rate of increase after one day is 0.16.

8 0
3 years ago
I'm confused, can someone explain? <br> which is bigger and why? 1/7 vs 0 and -1/7 vs 0
mylen [45]
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5 0
4 years ago
The candy store is having 30% off sell. Emma is going to buy $7.50 worth of candy. How much will she pay after the discount
Angelina_Jolie [31]

Answer:

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In order to find this, we first need to find the amount of the discount. We can do that by taking the overall amount and multiplying it by the percentage decrease.

$7.50 * 30% = $2.25

Now since we know the size of the discount, we can subtract it from the original cost.

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6 0
3 years ago
Read 2 more answers
Lilys car has a fuel efficiency of 8 liters per 100 kilometers.
zavuch27 [327]

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8 0
4 years ago
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