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2 years ago

If 15% of a number is 48 and 40% of the same number is 128, find 25% of that number.

Mathematics

2 answers:

Klio2033 [76]2 years ago

8 0

Answer:

Step-by-step explanation:

let the number be x:

then x * 15% = 48

x = 48 / 15%

x = 320

then x * 40% = 128

x = 128 / 40%

x = 320

So confirmed that the number is 320.

the number is 320, so 25% of it,

320 * 25% = 80

So, 25% of that 320 is 80. and that's out final answer

Zigmanuir [339]2 years ago

3 0

Answer:

Step-by-step explanation:

128/40= 3.2

3.2x 25= 80

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a scuba diver descended at a rate of 2 1/4 per second. If 0 represents the surface of the water and distances below the surface

Shtirlitz [24]

Answer:

The location will be at $- 28\frac{1}{8}$ units.

Step-by-step explanation:

A scuba diver descended at a rate of $2\frac{1}{4}$ units per second.

Now, if 0 represents the surface of the water and distances below the surface are negative, then after $12\frac{1}{2}$ seconds the location of the diver will be given by the followings :

In one second the diver descends by 2.25 units depth.

So, in 12.5 seconds the diver will descend by $(2.25 \times 12.5) = 28.125$ units i.e. $28\frac{1}{8}$ units depth.

Therefore, the location will be at $- 28\frac{1}{8}$ units. (Answer)

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3 years ago

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