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3 years ago

Geometry help will give brainliest

Mathematics

1 answer:

lidiya [134]3 years ago

3 0

If the dimensions are tripled then the surface area will increase by a factor of 3^2
That is by 9.

The volume will increase by a factor 3*3 (= 27).

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Hey can some one help me, Define a variable and write each phrase as an algebraic expression:

Elena L [17]

Answer:

1. d - 6 ft

where d is the width

2. t + 6 h/week

where t is the amount of time per week Theodore studies

3. t’ - 6 a

where t’ is Tracy’s age

4. (k/3) - 2

where k is the points that the panthers scored

Step-by-step explanation:

Write the variable and do the operations as described!

“less than” means subtraction, “more […] than” means addition and “one-third of” means division by 3.

8 0

3 years ago

The radius of the base of a cylinder is increasing at a rate of 7 millimeters per hour. The height of the cylinder is fixed at 1

Ilya [14]

Answer:

The rate of change of the volume of the cylinder at that instant = $791.28\ mm^3/hr$

Step-by-step explanation:

Given:

Rate of increase of base of radius of base of cylinder = 7 mm/hr

Height of cylinder = 1.5 mm

Radius at a certain instant = 12 mm

To find rate of change of volume of cylinder at that instant.

Solution:

Let $r$ represent radius of base of cylinder at any instant.

Rate of increase of base of radius of base of cylinder can be given as:

$\frac{dr}{dt}=7\ mm/hr$

Volume of cylinder is given by:

$V=\pi\ r^2h$

Finding derivative of the Volume with respect to time.

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

Plugging in the values given:

$\frac{dV}{dt}=\pi\ (1.5)\ 2(12)(7)$

$\frac{dV}{dt}=252\pi$

Using $\pi=3.14$

$\frac{dV}{dt}=252(3.14)$

$\frac{dV}{dt}=791.28\ mm^3/hr$ (Answer)

Thus rate of change of the volume of the cylinder at that instant = $791.28\ mm^3/hr$

6 0

3 years ago

Calculate the surface area of a solid box in the shape of a cube with side length 3cm.

RoseWind [281]

Answer:

54 cm^2

Step-by-step explanation:

side ( a ) = 3 cm

Formula : -

Surface area ( cube ) = 6a^2

Surface area ( cube )

= 6 x ( 3 )^2

= 6 x 9

= 54 cm^2

6 0

3 years ago

Read 2 more answers

Can anyone help!?! I don’t understand the distance formula. Can someone pls explain it?

Jobisdone [24]

Explain what? ........

5 0

3 years ago

How many times do you have to regroup to subtract 847 -268

navik [9.2K]

Answer:

= 3 R 43

= 3 43/268

847 divided by 268 equals

3 with a remainder of 43

5 0

2 years ago