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2 years ago

The fish tank was $50 yesterday, and today it has gone up by 25%... What's the new price?

Mathematics

1 answer:

Gennadij [26K]2 years ago

8 0

Answer: $62.5

Step-by-step explanation:

50 x 25% = 12.5

50+12.5=62.5

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On Friday it snowed 3 4/7 inches. On Saturday it snowed 2/7 inches. How much more did it snow on Friday then Saturday? A. 3 2/7

xxTIMURxx [149]

Answer:

Step-by-step explanation:

Since on Friday it snowed 3 4/7 inches and Saturday ir snowed 2/7 inches, subtract the two numbers to find the difference.

$3\frac{4}{7} -\frac{2}{7} =3\frac{4-2}{7} =3\frac{2}{7}$

The answer is A.

5 0

3 years ago

Sara and Jon each ordered a medium pizza. Sara ate 3/8 of her pizza for lunch and 1/4 for a snack. Jon ate 1/2 of his pizza for

Tema [17]

Jon ate 1/8 more of the pizza.

8 0

3 years ago

Please help me with 5

Fantom [35]

Bluegill
3/5 × 1100
660

catfish
70% × (1100-660)
70% × 440
308

so not catfish or blue gill
1100 - (660 + 308) = 132

6 0

2 years ago

A cylinder shaped can needs to be constructed to hold 400 cubic centimeters of soup. The material for the sides of the can costs

LenKa [72]

Answer:

The dimensions of the can that will minimize the cost are a Radius of 3.17cm and a Height of 12.67cm.

Step-by-step explanation:

Volume of the Cylinder=400 cm³

Volume of a Cylinder=πr²h

Therefore: πr²h=400

$h=\frac{400}{\pi r^2}$

Total Surface Area of a Cylinder=2πr²+2πrh

Cost of the materials for the Top and Bottom=0.06 cents per square centimeter

Cost of the materials for the sides=0.03 cents per square centimeter

Cost of the Cylinder=0.06(2πr²)+0.03(2πrh)

C=0.12πr²+0.06πrh

Recall: $h=\frac{400}{\pi r^2}$

Therefore:

$C(r)=0.12\pi r^2+0.06 \pi r(\frac{400}{\pi r^2})$

$C(r)=0.12\pi r^2+\frac{24}{r}$

$C(r)=\frac{0.12\pi r^3+24}{r}$

The minimum cost occurs when the derivative of the Cost =0.

$C^{'}(r)=\frac{6\pi r^3-600}{25r^2}$

$6\pi r^3-600=0$

$6\pi r^3=600$

$\pi r^3=100$

$r^3=\frac{100}{\pi}$

$r^3=31.83$

r=3.17 cm

Recall that:

$h=\frac{400}{\pi r^2}$

$h=\frac{400}{\pi *3.17^2}$

h=12.67cm

The dimensions of the can that will minimize the cost are a Radius of 3.17cm and a Height of 12.67cm.

3 0

3 years ago

-129 = -48 - n <br> Thank you

Flauer [41]

−129=−48−n

Simplify:

−129=−48+−n

Flip the equation.

−n−48=−129

Add 48 to both sides.

−n−48+48=−129+48

−n=−81

Divide both sides by -1.

−n/−1 = −81/−1

n=81

3 0

2 years ago