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

Write the contrapositive of the conditional statement. determine whether the contrapositive is true or false. if it is false, find a counterexample. a converse statement is formed by exchanging the hypothesis and conclusion of the conditional. a) a non-converse statement is not formed by exchanging the hypothesis and conclusion of the conditional. true b) a statement not formed by exchanging the hypothesis and conclusion of the conditional is a converse statement. false; an inverse statement is not formed by exchanging the hypothesis and conclusion of the conditional. c) a non-converse statement is formed by exchanging the hypothesis and conclusion of the conditional. false; an inverse statement is formed by negating both the hypothesis and conclusion of the conditional. d) a statement not formed by exchanging the hypothesis and conclusion of the conditional is not a converse statement. true

How can writing phrases as algebraic expressions you solve problems?

In a right triangle δabc, the length of leg ac = 5 ft and the hypotenuse ab = 13 ft. find: b the length of the angle bisector of angle ∠a.