3 years ago

Please help

Mathematics

1 answer:

cricket20 [7]3 years ago

8 0

Answer:

2.50x+80>4.00

Step-by-step explanation:

You might be interested in

Problem Solving with Angles. Quiz. Level

Tpy6a [65]

Answer:

I was too late to answer sorry

3 0

3 years ago

How many quarter inches long is 7 3/4

Amiraneli [1.4K]

There are 4 quarterly inches in 1 inch so 4 x7=28 + 3 quarter in 3/4 so 31 quarter inches in all.

7 0

3 years ago

What is the area of the composite figure?<br><br> D) 48 cm

arlik [135]

Answer:

The answer is c

Step-by-step explanation:

C.88cm

5 0

3 years ago

How to evaluate 164

Pepsi [2]

Answer:

164=82+82 or 164=82 x 2

Step-by-step explanation:

Hope that works

7 0

3 years ago

webassign If a snowball melts so that its surface area decreases at a rate of 6 cm2/min, find the rate at which the diameter dec

drek231 [11]

Answer:

The answer is $\frac{3}{10\pi } cm/min$

Step-by-step explanation:

Assuming the snowball is a perfect sphere, then if A denotes the surface area and D the diameter then:

$A=4\pi r^{2} = 4\pi (\frac{D}{2} )^{2} =\pi D^{2}$

Differentiating wrt r we have:

$\frac{dA}{dD} =2\pi D$

We are told that $\frac{dA}{dt}= -6$ and we want to find $\frac{dD}{dt}$

By the chain rule we have:

$\frac{dA}{dD}=\frac{dA}{dt}.\frac{dt}{dD}=\frac{\frac{dA}{dt} }{\frac{dD}{dt} }$

∴ $2\pi D=-\frac{6}{\frac{dD}{dt} }$

∴ $\frac{dD}{dt}=-\frac{6}{2\pi D}$

When D=10 then

$\frac{dD}{dt} =-\frac{6}{10*2\pi } =-\frac{3}{10\pi }$

The sign (-) shows that the D is decreasing.

3 0

3 years ago