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Olegator [25]
3 years ago
13

Plz Help!

Mathematics
1 answer:
lukranit [14]3 years ago
3 0
V= 3.14*5*4= 62.8 cubic units thanks!!
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A rectangle that is 2 inches by 3 inches has been scaled by a factor of 7.
loris [4]

Answer:

New\ Lengths = (14,21)

New\ Scale\ Factor = \frac{1}{7}

Step-by-step explanation:

Given

Rectangle:

Length = 2 in

Width = 3 in

Scale Factor = 7

Solving (a):

The side lengths of the new scale is calculated as follows;

New Lengths = Old Lengths * Scale Factor

New\ Lengths = (2,3) * 7

New\ Lengths = (2 * 7,3* 7)

New\ Lengths = (14,21)

Solving (b): To go back to the original length

Given that the initial scale factor is 7;

The new scale factor is the reciprocal of the old factor;

Hence;

New\ Scale\ Factor = \frac{1}{7}

6 0
3 years ago
A circle has a radius of 9 cm.
stira [4]

Radius = 9cm

So,

Area of circle = πr²

= π(9)²

= π × 81 cm²

= 81π cm²

8 0
2 years ago
Read 2 more answers
To rent a moving truck for the day, it costs $50 plus $3 for every mile driven. Write an algebraic expression for the cost to re
malfutka [58]

Multiply the cost per mile by number of miles “m” and add that amount to the $50:

Total = 3m + 50

3 0
2 years ago
Read 2 more answers
Nancy prepared 12 kilograms of dough after working 6 hours. How much dough did Nancy prepare if she worked for 10 hours? Solve u
damaskus [11]

Answer:

20 kilograms of dough

Step-by-step explanation:

Given that;

12 kilograms working 6 hours

Rate = 12/6 kilogram per hour = 2 kilogram per hour

So,

In 10 hours he would produce;

Amount of dough = Time × rate

Time = 10 hours

= 10 hours × 2 kilograms per hour

= 20 kilograms of dough

6 0
3 years ago
Read 2 more answers
What is the average of -2.6, 1.8, -3.3, -2.7, 2.2 ?<br> I dont understand this.
olya-2409 [2.1K]
Average = Mean

To find the mean, add up the numbers and divide it by how many numbers there are.

So,  -2.6+1.8+(-3.3)+(-2.7)+2.2=-4.6

There are 5 numbers in total.

-4.6 \div 5=-0.92

To do these types of division, ignore the decimal and add a 0 at the end.

So we can do:
-460\div5=-92

And put back the decimal.
Hope this helps :)
4 0
2 years ago
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