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Stella [2.4K]
3 years ago
5

helicopter speed increases from 30 m/s to 40 m/s in five seconds what is the acceleration of this helicopter

Mathematics
1 answer:
Vinil7 [7]3 years ago
4 0

The helicopter undergoes an average acceleration of

\dfrac{40\frac{\rm m}{\rm s}-30\frac{\rm m}{\rm s}}{5\,\mathrm s}=2\dfrac{\rm m}{\mathrm s^2}

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A new pair of shoes is advertised for $110. The sales tax is 7.5%. What is the total cost of the shoes?
Mashcka [7]

Answer:

118.25

Step-by-step explanation

If the tax is in percent, divide the tax rate by 100. You do this by moving the decimal point two spaces to the left. In this, there's 7.5/100 = 0.0

Find the tax value by multiplying tax rate by the item value:

tax = 110 × 0.075

tax = 8.25

5 0
3 years ago
Pls help and show your work
Dmitriy789 [7]

Answer:

21. Vol. = L ^ 3

or, 27000 = L ^ 3

or, cube root undefr 27000 = L

Therefore, Edge length = 30 cm

22.

a. v = l ^ 3

or, 64000 = l ^ 3

or, cube root under 64000 = L

or, l = 40 cm

Also,

surface area = 6 a ^ 2

= 6 * 40 ^ 2

= 6 * 1600

= 9600 cm ^ 2 #

Hope this helped

Hope this helped ALL THE BEST !!

5 0
3 years ago
Can you help me?<br> Find the h <br> Find h
Kazeer [188]

Answer:

h=6

Step-by-step explanation:

according to Pythagorean theorem

h²=p²+b²

p²= 10²-8²

h²=100-64 by question (p=h)

h√36

h=6

8 0
2 years ago
How do i solve this? please help.<br><br>5x - 6 - 2x = 3 ( x - 2 )
MAXImum [283]

Answer:

Infinite Solutions

Step-by-step explanation:

Distribute the 3 by multiplying it to the two terms on the right side.

5x - 6 - 2x = 3x - 6

Isolate the x value to the left and move the other terms to the right.

5x - 2x - 3x = 6 - 6

Combine all like terms.

3x - 3x = 0

0x = 0

All numbers multiplied by zero is still zero, so this equation has infinite solutions.

7 0
3 years ago
Read 2 more answers
Solve the proportion.<br><br> 8/7 = n/9
RoseWind [281]
\frac{8}{7} = \frac{n}{9}

Cross multiply the fractions:

7 \times n = 7n
8 \times 9 = 72

7n = 72

Divide both sides by 7 to get n by itself:

72 \div 7 = 10.28
n = 10.28

The value of n is 10.28.
5 0
4 years ago
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