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marta [7]
2 years ago
9

A train travels between two stations A anf B at a distance of 108 km in 45 minutes

Mathematics
1 answer:
frosja888 [35]2 years ago
8 0
It travels 45 minutes to stations A and B duhh
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How much this will be ......evaluate -4 (9)(-5)
klemol [59]
-4(9)(-5) = (-36)(-5) because -4(9) = -36. (-36)(-5) = 180
3 0
3 years ago
After 9 months, the simple interest earned on an investment of $1200 is $72. find the interest rate.
Deffense [45]
Use the formula i=prt, where i is the interest earned, p is the principal, r is the rate (as a decimal fraction) and t is the elapsed time, in years.

Here i = $72 = $1200 r (9/12)                    (9 months is 9/12, or 3/4, of 1 year)
Reducing, 
              $72 = $900r
                                          Solving for r, r=0.08, or 8 percent per year.
7 0
3 years ago
Trent's mom grave him $30. He earned another $12 completing chores. Trent spent $15 at the movie theater and $6 on lunch. How mu
cluponka [151]
30+12=42
15+6=21
42-21=21
Trent has $21 dollars left.
8 0
3 years ago
Read 2 more answers
An engineer commutes daily from her suburban home to her midtown office. The average time for a one-way trip is 36 minutes, with
Ivanshal [37]

Answer:

57.93% probability that a trip will take at least 35 minutes.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 36, \sigma = 4.9

What is the probability that a trip will take at least 35 minutes

This probability is 1 subtracted by the pvalue of Z when X = 35. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{35 - 36}{4.9}

Z = -0.2

Z = -0.2 has a pvalue of 0.4207

1 - 0.4207 = 0.5793

57.93% probability that a trip will take at least 35 minutes.

3 0
3 years ago
A kite in the shape of a rhombus has diagonals that are 25 in Long and 15 in Long what is the area of the kite
mylen [45]

Answer: 187.5

Step-by-step explanation:

formula for area of a kite is: diagonal 1 times diagonal 2 over 2. plug those numbers in and you’ll get your answer. 25 times 15 / 2.

5 0
2 years ago
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