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3 years ago

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

Ivan3 years ago

8 0

THIS HAS NO SOLUTION BECAUSE THERE ISNT X2

EastWind [94]3 years ago

3 0

I'd say C, hopefully that helps.

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Simplify the expression below as much as possible (6-i)+(4+2i)-(-2+i)

Luba_88 [7]

Answer:

=6-i+4+2i+2-i

=6+4+2+2i-i-i

=12+2i-2i

=12

4 0

2 years ago

What is 15.75 rounded to the whole number

victus00 [196]

Answer:

C. 16

Step-by-step explanation:

4 0

3 years ago

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cylinder shaped can needs to be constructed to hold 200 cubic centimeters of soup. The material for the sides of the can costs 0

Dafna11 [192]

Answer:

Radius=2.09 cm

Height,h=14.57 cm

Step-by-step explanation:

We are given that

Volume of cylinderical shaped can=200 cubic cm.

Cost of sides of can=0.02 cents per square cm

Cost of top and bottom of the can =0.07 cents per square cm

Curved surface area of cylinder= $2\pi rh$

Area of circular base=Area of circular top= $\pi r^2$

Total cost,C(r)= $0.02\times 2\pi rh+2\pi r^2\times 0.07$

Volume of cylinder, $V=\pi r^2 h$

$200=\pi r^2 h$

$h=\frac{200}{\pi r^2}$

Substitute the value of h

$C(r)=0.02\times 2\pi r\times \frac{200}{\pi r^2}+2\pi r^2\times 0.07$

$C(r)=\frac{8}{r}+0.14\pi r^2$

Differentiate w.r.t r

$C'(r)=-\frac{8}{r^2}+0.28\pi r$

$C'(r)=0$

$-\frac{8}{r^2}+0.28\pi r=0$

$0.28\pi r=\frac{8}{r^2}$

$r^3=\frac{8}{0.28\pi}=9.095$

$r=(9.095)^{\frac{1}{3}}=2.09$

Again, differentiate w.r.t r

$C''(r)=\frac{16}{r^3}+0.28\pi$

Substitute the value of r

$C''(2.09)=\frac{16}{(2.09)^3}+0.28\pi=2.63>0$

Therefore,the product cost is minimum at r=2.09

h= $\frac{200}{\pi (2.09)^2}=14.57$

Radius of can,r=2.09 cm

Height of cone,h=14.57 cm

4 0

3 years ago

If anyone could do 1,2,3 or 4 that would be great! thanks and i’ll give brainliest :)

Dmitry_Shevchenko [17]

Answer:

ok i will teach all just chat me

Step-by-step explanation:

7 0

3 years ago

Could some one pllz give me real answers

timofeeve [1]

Answer:

See below

Step-by-step explanation:

You just need 1/4 of everything:

1/4 c peanut butter

1/4 c brown sugar

1/4 c gran sugar

1/4 c butter

1/2 egg

1/4 tsp baking soda

1/4 tsp baking powder

1/4 tsp vanilla

5/8 c flour

8 0

2 years ago

Read 2 more answers