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liraira [26]
3 years ago
8

How long will it take Karen to drive 975 miles, if her average speed is 65 miles per hour? Write a formula

Mathematics
2 answers:
ivann1987 [24]3 years ago
7 0
Hope this helps but the answer is 15 hours because 975/65=15
irga5000 [103]3 years ago
6 0
It'll take her 15 hours.
Formula:   975= 65x 
Where x represents hours
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A satellite can move at 17,000 miles per hour. How many hours will it take to reach a star that is three light years away? Recal
babunello [35]
First convert the distance to miles 

<span>9.5 × 10^12 km x 0.62 miles/km </span>
<span>= (0.62 × 9.5) x 10^12 miles </span>
<span>= 5.9 × 10^12 miles </span>

<span> we want to triple that, because it is 3 light years (not just 1): </span>
<span>3 x 5.9 × 10^12 miles </span>
<span>≈ 18 × 10^12 miles </span>
<span>≈ 1.8 × 10^13 miles </span>

<span>Next divide by the speed to get the time (in hours). </span>
<span>t = 1.8 × 10^13 miles / 17000 miles/hour </span>

<span>convert the speed to scientific notation: </span>
<span>t = 1.8 × 10^13 / 1.7 x 10^4 </span>

<span>t = (1.8 / 1.7) × (10^13 / 10^4) <-- when dividing powers with the same base, subtract the exponents </span>
<span>t ≈ 1.1 × 10^9 </span>

<span>convert that back to standard notation. </span>

<span>Answer: </span>
<span>1,100,000,000 hours (P.S. That is about 120,000 years).
Hope this helps!!!</span>
4 0
4 years ago
Read 2 more answers
Answer choices :<br> A-90<br> B-360
vladimir1956 [14]

Answer:

Step-by-step explanation:

Re-read

4 0
3 years ago
The table displays the frequency of scores for a calculus class on an exam. The mean of the exam scores is 3.5. Score 1 2 3 4 5
vladimir1956 [14]

Answer:

f=11

Mode=4

Median=4

Explanation:

We are given that

a.Mean of the exam score,\bar x=3.5

Score(x)   frequency   C.F

1                  1                 1

2                  3                4

3                  f                 15(4+f=4+11)

4                  13               28

5                   4               32

\sum f_i=1+3+f+13+4=21+f

\sum f_ix_i=1(1)+2(3)+3(f)+4(13)+5(4)=1+6+3f+52+20=79+3f

(\bar x)=\frac{\sum f_ix_i}{\sum f_i}

Using the formula

3.5=\frac{79+3f}{21+f}

73.5+3.5f=79+3f

3.5f-3f=79-73.5

0.5f=5.5

f=\frac{5.5}{0.5}=11

b.Mode:The number which is repeat most times .

4 repeat most times

Hence, mode of all exam scores=4

N=32

N is even

Median=\frac{(\frac{n}{2})^{th}+(\frac{n}{2}+1)^{th}}{2}

Median=\frac{16th+17th}{2}=\frac{4+4}{2}=\frac{8}{2}=4

7 0
3 years ago
For a decreasing function, how will the right-hand sum compare with the exact area under the curve over a given interval? The ri
ANEK [815]

Answer:

A. Underestimate

Step-by-step explanation:

Edge 2021

4 0
3 years ago
Which equation must be true for m(x) and n(x) to be inverse?
diamong [38]

Answer:

  see below

Step-by-step explanation:

When the functions are inverses of each other, it will be true that ...

  m(n(x)) = n(m(x)) = x

The expanded form of this equation is shown below.

3 0
3 years ago
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