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2 years ago

A dolphin is 9 below the surface of the ocean.if it’s position can be recorded as -9 what word the position of 0 represent?

Mathematics

1 answer:

pashok25 [27]2 years ago

5 0

Answer: 0 represents the surface of the ocean

Step-by-step explanation: Words like 'below' indicate a negative number. Since the dolfin's positions is -9 below the sea level, the equation x-9=-9 can be created (let x = ocean surface level). Add 9 to both sides to cancel out -9 on the left side and isolate x. You have x = 0, so the ocean surface is 0.

Of course, you don't have to do all that! That was a in-depth explanation. Just make sure to look at the wording :P

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A square pyramid has a volume of 20 cubic feet and a base length of 5 feet. What is it's height?

erastova [34]

Answer:

The height of the pyramid is $2.4\ ft$

Step-by-step explanation:

we know that

The volume of a square pyramid is equal to

$V=\frac{1}{3}b^{2}h$

we have

$V=20\ ft^{3}$

$b=5\ ft$

substitute and solve for h

$20=\frac{1}{3}(5)^{2}h$

$60=(25)h$

$h=60/(25)=2.4\ ft$

5 0

3 years ago

A rectangle measures 12 cm by 4 cm what is the area

Maslowich

In order to find the area you have to multiply length x width
In this case our length and width are 12cm and 4cm
So lets multiply those. :P
12 x 4 = 48 cm

Your area = 48cm²

Good Luck! :)

6 0

3 years ago

Help please!!! A bag contains 50 marbles, 10 of which are blue, 8 are red, 20 are green, and 12 are purple. Marcie takes a marbl

Andru [333]

Answer:

Step-by-step explanation:

We would need to multiply the number of trials (which is 500) by the probability of choosing a red in 1 try from the information given.

<em>There are 50 in total, and 8 of them are red, so:</em>

P(red) = $\frac{8}{50}=0.16$

<em>Now we multiply this with 500 to get:</em>

$500*0.16=80$

The correct answer is A.

5 0

3 years ago

Read 2 more answers

Grapes cost $3.25 per pound. Darius paid a total of $26 for grapes.

Dmitry [639]

Answer:He buys 8 pounds

Step-by-step explanation:

You can either just add up the $3.25 until you get to the end-price, but that wont always work for every problem. The best way is to divide the 26 with the 3.25 in a written devision.

4 0

3 years ago

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A laptop computer is purchased for 2300 . After each year, the resale value decreases by 35% . What will the resale value be aft

denis-greek [22]

100-35 = 65
65% de 2300 = 1495 (mes 1)
2300-1495 = 805 (mes 2)
65% de 805 = 523,25 (mes 3)
65% de 523,25 = 340,1125 ~ 340,10 (mes 4)

8 0

3 years ago