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nignag [31]
2 years ago
5

Seraphina is driving two hours to visit her family. For the first hour, she traveled at a speed of 56 miles per hour. Then, in t

he second hour, she traveled at a speed of 72 miles per hour. What is the percentage increase of Seraphina's speed? If necessary, round to the nearest tenth of a percent.
Mathematics
1 answer:
RUDIKE [14]2 years ago
4 0

Answer

128

Step-by-step explanation:

72+56=128

You are welcome

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7 0
3 years ago
Read 2 more answers
Please help answer! :)<br> How are significant digits related to calculations using measurements?
Marysya12 [62]

The number of significant figures is the number of digits that is believed to be correct by the person doing the measuring.

<h3>What are significant figures?</h3>

It should be noted that significant figures are the number of digits in a value, that contribute to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.

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3 0
2 years ago
Suppose A is a matrix and k is a positive integer. What does the notation Ak mean?
Butoxors [25]

Answer:

Scalar product

Step-by-step explanation:

The scalar product of a matrix refers to the product of a matrix and a number. The scalar is used to multiply each element in the matrix to get the final vector. In the question the scalar is k which is a constant and the matrix is A.

in the example below 2 is the scalar

2*\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]

the final matrix will be

\left[\begin{array}{ccc}2&4&6\\8&10&12\\14&16&18\end{array}\right]

7 0
3 years ago
If a vertical plane sliced a sphere, what would be the 2-D cross section?
Colt1911 [192]
Answer:
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Explanation:
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4 0
3 years ago
The sum of two numbers is seventeen. Three less than three times the smaller is equal to the larger
tia_tia [17]
The numbers are 5 and 12.
Smaller number = x
Larger number = y
x +y =17
y = 3x - 3
x +3x -3 = 17
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smaller number is 5
y = 3(5) - 3
y = 12
larger number is 12.
8 0
3 years ago
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