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2 years ago

1)An employee’s hourly raise went up from 10$ per hour to 12$ per hour. What is the rate of increase?

Mathematics

1 answer:

Step2247 [10]2 years ago

4 0

1- went up 20%

2- went up 7%

Hope this helps:)

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What is the ratio of the intensities of an earthquake PP wave passing through the Earth and detected at two points 19 kmkm and 4

Tamiku [17]

Answer:

The ratio of the intensities is roughly 6:1.

Step-by-step explanation:

The intensity I() of an earthquake wave is given by:

$I = \frac{P}{4\pi d^{2}}$

<em>where P: is the power ans d: is the distance. </em>

Hence, the ratio of the intensities of an earthquake wave passing through the Earth and detected at two points 19 km and 46 km from the source is:

$\frac{I_{1}}{I_{2}} = \frac{P/4\pi d_{1}^{2}}{P/4\pi d_{2}^{2}}$

<em>where I₁ = P/4πd₁², d₁=19 km, I₁ = P/4πd₂² and d₂=46 km </em>

$\frac{I_{1}}{I_{2}} = \frac{d_{2}^{2}}{d_{1}^{2}}$

$\frac{I_{1}}{I_{2}} = \frac{46 km^{2}}{19 km^{2}}$

$\frac{I_{1}}{I_{2}} = 5.9:1$

Therefore, the ratio of the intensities is roughly 6:1.

I hope it helps you!

3 0

2 years ago

Which expression represents this word phrase? seven less than the quotient of x and 9

KIM [24]

Required expression is x/9 - 7

4 0

2 years ago

What is the slope of the line that passes through the points (-3,2) and (-1,-5)

Oduvanchick [21]

Answer:

m = -7/2

Step-by-step explanation:

(y2-y1) / (x2-x1)

(-5 - 2) / ( -1 -3)

= -7/2

hope that helps :D

7 0

2 years ago

What is the relationship between the number of vertices in each polygon and the number of isosceles triangles?

melisa1 [442]

no. of vertices = no. of isosceles triangle

5 0

2 years ago

Read 2 more answers

An arithmetic sequence with a thrid term of 8 and constant difference of 5

olga nikolaevna [1]

$\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
d=5\\
a_3=8\\
n=3
\end{cases}
\\\\\\
a_3=a_1+(3-1)5\implies 8=a_1+(2)5\implies 8=a_1+10
\\\\\\
\boxed{-2=a_1}
\\\\\\
a_n=-2+(n-1)5$

8 0

3 years ago