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3 years ago

Please respond quickly, 15 points up for grabs.

Mathematics

1 answer:

Cerrena [4.2K]3 years ago

3 0

The right answer should be 7 years:)

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One cubic meter of water weighs approximately 2200 pounds. There are 100 cm in one meter. If you have a box-shaped fish tank tha

Diano4ka-milaya [45]

Answer:

158.4 pounds

Step-by-step explanation:

first find the volume of the tank

$V = 30 \times 30 \times 80$

$V = 72000 cm^3$

to convert this to m^3 we know that 1m = 100cm

$V = 72000 cm^3 \times \left(\dfrac{1\,\text{m}}{100\,\text{cm}}\right)^3$

$V = 72000 cm^3 \times \left(\dfrac{1\,\text{m}^3}{100^3\,\text{cm}^3}\right)$

the cm^3 cancel out.

$V = \dfrac{72000}{100^3} m^3$

$V = 0.072\,m^3$

by simply converting the side-lengths to meters beforehand can give you this answer directly:

$V = 0.3 \times 0.3 \times 0.8 = 0.072 m^3$

it is given that 1 meter cube of water weighs about 2200 pounds.

$1\,m^3 = 2200 \,\text{lb}$

multiply both sides with 0.072 to find our answer:

$1\,m^3 \times 0.072 = 2200 \times 0.072 \,\text{lb}$

$0.072\,m^3 = 158.4 \,\text{lb}$

hence the weight of the water in the tank would be 158.4 pounds!

3 0

3 years ago

In a right triangle, angle φ has a tangent value of 1.40. The side adjacent to angle φ has a length of 9.0 inches. What is the l

charle [14.2K]

Answer:

b) 12.6 inches

Step-by-step explanation:

tangent is the ratio of the side opposite over adjacent, so if we let x= length of the opposite side, 1.40=x/9, x=12.6 inches

3 0

3 years ago

Desert, tundra, ice, and mountains make up 24% of Earth's surface. Which fraction is equivalent to 24%?

crimeas [40]

Answer:

6/25

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Pls help I need a good grade Z/5+3=-35 Show your work

alexandr1967 [171]

Answer: z=-190

Step-by-step explanation:

7 0

3 years ago

Find x in each triangle. PLZ HELP!!!

jonny [76]

Answer:

x=3.4

Step-by-step explanation:

Use the Pythagorean theorem:

$a^2+b^2=c^2$

a and b are the legs and c is the hypotenuse (x)*

Insert the values:

$3^2+1.6^2=x^2$

Simplify exponents

$9+2.56=x^2$

Simplify addition:

$11.56=x^2$

Find the square root:

$\sqrt{11.56}=\sqrt{x^2}$

$3.4=x\\x=3.4$

Finito.

*The hypotenuse is the side opposite the 90° angle and the longest side of a triangle, always.

3 0

3 years ago