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3 years ago

Write an expresdion that is equal to 3 x 2 1/4

Mathematics

1 answer:

11111nata11111 [884]3 years ago

4 0

3 x 2.25 or 6.75 are also valid.

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Please help me thank you sooooo much ( also if you take my points <br>I'm reporting you)

Amanda [17]

Answer: x=-10.2 but for me the real answer is x=10.2 but go for x=-10.2

Step-by-step explanation: hope this help

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3 years ago

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What is -27 equals 4.5 s

iVinArrow [24]

If the sine if 4/5, then the side opposite is 4 and the hypotenuse is 5. This means it's the 3, 4, 5 right triangle (or similar, such as 6, 8, 10).
cos = 3/5
tan = 4/3
cot = 3/4
sec = 5/3
csc = 5/4

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3 years ago

The radius of a sphere is increasing at a rate of 4 mm/s. How fast is the volume increasing (in mm^3/s) when the diameter is 60

nexus9112 [7]

Answer:

The volume is increasing at a rate of 1508 cubic millimeters per second when the diameter is 60 mm.

Step-by-step explanation:

Volume of a sphere:

The volume of a sphere is given by the following equation:

$V = \frac{4\pi r^3}{3}$

In which r is the radius.

Implicit derivatives:

This question is solving by implicit derivatives. We derivate V and r, implicitly as function of t. So

$\frac{dV}{dt} = 4\pi r^2 \frac{dr}{dt}$

The radius of a sphere is increasing at a rate of 4 mm/s.

This means that $\frac{dr}{dt} = 4$

How fast is the volume increasing (in mm^3/s) when the diameter is 60 mm?

This is $\frac{dV}{dt}$ when $r = \frac{d}{2} = \frac{60}{2} = 30$ . So

$\frac{dV}{dt} = 4\pi r^2 \frac{dr}{dt}$

$\frac{dV}{dt} = 4\pi*(30)^2*4$

$\frac{dV}{dt} = 1508$

The volume is increasing at a rate of 1508 cubic millimeters per second when the diameter is 60 mm.

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3 years ago

Sandra wants to give a party for 60 people. She has a punch recipe that makes 2 gallons of punch and serves 15 people. How many

zmey [24]

Answer:

8 gallons

Step-by-step explanation:

#1: Set up a ratio from the recipe: gallons of punch to the number of people.

2 gallons 15 people

#2: Set up a ratio of gallons to the people coming to the party.

(Place the gallons on top) x gallons 60 people

#3: Set up a proportion 2 gallons x gallons

15 people = 60 people

* Like units should be across from each other

4) Solve using the "lonely mate" formula

2 gallons x gallons

15 people = 60 people

2 x 60 = 120

120/15 = 8

This means she should make 8 gallons.

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3 years ago

Rajah has with his parents?

Tomtit [17]

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3 years ago

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