If a is increased by 50% and b is decreased by 50%, the resulting numbers will be equal. what is the ratio of a to b?

1:3

Step-by-step explanation:

To answer this, since the resulting numbers are equal, we can choose any arbitrary number for the resulting number.

Let the resulting number be 100.

As deduced from the question, A is increased by 50%, this means before the increment, A had a value of 66(2/3), an increment of 33(1/3) gave its present value.

Now, we were told that B was decreased by 50%, this means initially, B was at a value of 200.

Now the ratio of A to B is:

66(2/3) to 200

Converting A to improper fraction will yield 200/3.

The ratio is thus

200/3 : 200

This is same as

1/3 : 1 or simply 1:3

50- 250 is correct i did that one too

step-by-step explanation:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: