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Elan Coil [88]
2 years ago
7

A rocket is 1 mile above the earth in 30 seconds and 5 miles above the earth in 2.5 minutes. What is the rockets rate of change

in miles per second?
Mathematics
1 answer:
tamaranim1 [39]2 years ago
6 0
The rockets rate of change in miles per second is: (5 - 1)/(2.5*60 - 30) = 1/30 miler per second or 0.033 the rockets rate of change in miles per minute is: (5 - 1)/(2.5 - 30/60) = 2 miles per minute
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If 2% of a number equals 8, find 10% of that number.
torisob [31]

Answer:

40

Step-by-step explanation:

2% of 400 is 8

400 x 0.02 = 8

10% of 400 is 40

7 0
2 years ago
A machine in an office can shred 65 sheets of paper every 5 seconds. How many sheets of paper can the machine shred in 60 second
Tema [17]

Answer:

780 sheets

Step-by-step explanation:

we know that

A machine can shred 65 sheets of paper every 5 seconds

so

using proportion

Find out how many sheets of paper can the machine shred in 60 seconds

7 0
3 years ago
Read 2 more answers
Jonah is going to the store to buy candles. Small candles cost $2.50 and large candles cost $7.00. He needs to buy at least 20 c
artcher [175]

<em><u>The system of linear inequalities are:</u></em>

a + b \geq 20\\\\2.50a + 7b\leq 80

<em><u>Solution:</u></em>

Let "a" be the number of small candles bought

Let "b" be the number of large candles bought

<em><u>He needs to buy at least 20 candles</u></em>

Therefore, number of small candles and number of large candles bought must be at least 20

Thus, we frame a inequality as:

a + b \geq 20

"at least" means greater than or equal to

Here, we used "greater or equal to" symbol because, he can buy 20 candles or more than 20 candles also

From given,

Cost of 1 small candle = $ 2.50

Cost of 1 large candle = $ 7

<em><u>He can spend no more than 80 dollars</u></em>

Which means, he spend maximum 80 dollars or less than 80 dollars also

So we have to use "less than or equal to" symbol

<em><u>Thus, we frame a inequality as:</u></em>

Number of small candles bought x Cost of 1 small candle + number of large candles bought x Cost of 1 large candle \leq 80

a \times 2.50 + b \times 7 \leq 80\\\\2.50a + 7b\leq 80

<em><u>Thus the system of linear inequalities are:</u></em>

a + b \geq 20\\\\2.50a + 7b\leq 80

3 0
3 years ago
Who turns out the lights on Halloween
kvv77 [185]
The owner of the house
8 0
3 years ago
Make z the subject 9d= 6z - 5d
yarga [219]

Answer:

z=2\frac{1}{3}d

Step-by-step explanation:

9d=6z-5d

6z=9d+5d

6z=14d (combine like terms)

z=2\frac{1}{3}d

Hope this helps :)

4 0
3 years ago
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