Events a and b are independent. find the indicated probability. show your work!
a. p(a) = 0.3, p(b) = 0.5, p(a and b) = ?
b. p(a) = ? , p(b) = 0.9, p(a and b) = 0.45

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:

answer: no

step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.