you choose a marble at random from a bag containing 15 red marbles, 7 yellow marbles, and 3 pink marble. you replace the marble and then choose again. find the probability of P(both red)

9/25

Step-by-step explanation:

15 red marbles, 7 yellow marbles, and 3 pink marble = 25 marbles

1st marble red

P(red) = red/total = 15/25 = 3/5

replace

15 red marbles, 7 yellow marbles, and 3 pink marble = 25 marbles

2nd marble red

P(red) = red/total = 15/25 = 3/5

P(red, replace,red) = P(red) * P(red) = 3/5 * 3/5 = 9/25

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: