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4 years ago

What is 6/9 times 7/9

1 answer:

8 0

0.51851851851You can search for any mathematical expression, using functions such as: sin, cos, sqrt, etc. You can find a complete list of functions here.RadDegx!Invsinlnπcoslogetan√AnsEXP<span>xy</span>()%AC789÷456×123−0.=<span>+

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A fence is to be built to enclose a rectangular area of 220 square feet. The fence along three sides is to be made of material t

VikaD [51]

Answer: a rectangle is a quadrilateral having opposing sides parallel and four right angles

Area of rectangle = length * width

Step-by-step explanation: Given Area of rectangle = 220 square foot

1 side of the fence = 220/4 = 55 feet

If 3 sides of the fence cost $3

Total cost for 3 sides of the fence = ( 55 + 55 + 55) * 3 = 165 * 3 = $495

Total cos for the 4th side = 55 * 13 = $715

It is more economical to construct the fence with materials that cost $3.

7 0

4 years ago

Please help idk this

olga nikolaevna [1]

The answer would be 2 4/5

3 0

3 years ago

water is being pumped into an inverted conical tank at some constant rate. the tank has a height of 600 cm and the diameter of t

Marat540 [252]

It is found that water is being pumped at a rate of 838095.24 cm³/min using implicit differentiation.

A conical tank's volume (V) is calculated as follows:

$V = \frac{\pi r^{2} h}{3}$

where the height is h and the radius is r.

When we use implicit differentiation, we get the following:

$\frac{dV}{dt} = \frac{\pi }{3} (2rh \frac{dr}{dt} + r^{2} \frac{dh}{dt} )$

We have that:

Height of 600 cm, thus h = 600 cm

Diameter of 400 cm, thus r = $\frac{400}{2}$ = 200 cm

Water level rising at a rate of 20 cm/min, thus $\frac{dh}{dt} = 20 cm/min$

Since the radius is constant, $\frac{dr}{dt} = 0$

Pumping water into the tank happens at a rate $\frac{dV}{dt}$ of

$\frac{dV}{dt} = \frac{\pi }{3} (2rh \frac{dr}{dt} + r^{2} \frac{dh}{dt} )$

$\frac{dV}{dt} = \frac{\pi }{3} ((2 * 200 *600 * 0) + (200)^{2} * 20)$

$\frac{dV}{dt} = \frac{\pi }{3} ( 0 + 40000 * 20)$

$\frac{dV}{dt} = \frac{\pi }{3} (800000)$

$\frac{dV}{dt} = \frac{22 }{7*3} (800000)$

$\frac{dV}{dt} = \frac{22 }{21} (800000)$

$\frac{dV}{dt} = 838095.24\; cm^{3}/min$

Therefore, the rate of water pumping into the tank is 838095.24 cm³/min.

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4 0

1 year ago

Marcus are 1/3 of a pizza on Monday night. He then ate 1/4 of the remaining pizza on Tuesday. Which of the following expressions

OleMash [197]

Answer:

B would be correct.

Step-by-step explanation:

You have to subtract the 1/3 and 1/4 by the whole pizza (1) otherwise you never had a whole pizza according to your equation. By doing 1-1/3 you solve for the amount left on Monday, and when you subtract 1/4 from the number you just got, you have solved for the total amount left on Tuesday.

1-1/3=2/3

2/3-1/4= 2/3 * 4/4 - 1/4 * 3/3 =

8/12-3/12= 5/12 of a pizza left

6 0

3 years ago

Please help this is for my final grade and it was due last night I was so tired so I took a nap and woke up and 1 am and the ass

Tcecarenko [31]

Your answers are 24 and 63

The ratio for Friday to Saturday is 1 to 8. There were 7 total cars on Friday, and 56 on Saturday. 7 x 8 = 56, so that is how you get that ratio. Multiply 3 x 8 to fill in the blank for how many hybrid cars there were on Saturday. (24)

For Sunday, we know the three hybrid cars Friday Friday, and 27 hybrid cars from Sunday. 3×9 is 27, so you have to multiply the total number of cars from Friday, 7 x 9 to get the total number of cars for Sunday. (63)

I hope this helped.

4 0

3 years ago