PLEASE HELP thank you:) Carlos is investigating the brightness of a lightbulb.
The brightness of a lightbulb, B lumens/m2, is inversely proportional to the square of the
distance from the lightbulb to the point where the brightness is being measured, Dm.
At 3 m from a lightbulb, Carlos measures the brightness of the lightbulb is 4.5 Lumens/m2
(a) Work out the brightness of the lightbulb at 5 m away.
Give your answer in lumens/m2

At an unknown distance from the lightbulb, Carlos measures the brightness of the lightbulb
to be 0.5 lumens/m2
(b) Work out the distance from the lightbulb where the brightness is 0.5 lumens/m2

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d. what is the height of the tide after 93 hours?

If rs 900 amounts to rs 1044 in 4 years, what sum will amount to 1368 in 3 1/2 years at the same rate

Data for the height of a model rocket launch in the air over time are shown in the table. darryl predicted that the height of the rocket at 8 seconds would be about 93 meters. did darryl make a good prediction? yes, the data are best modeled by a quadratic function. the value of the function at 8 seconds is about 93 meters. yes, the data are best modeled by a linear function. the first differences are constant, so about 93 meters at 8 seconds is reasonable. no, the data are exponential. a better prediction is 150 meters. no, the data are best modeled by a cubic function. a better prediction is 100 meters.