25 points for correct answer!
what is the correlation between the number of hours studying and the number of mistakes made on the exam?
(a) not enough information is given
(b) negativity correlated
(c) positively correlated
(d) no correlation

Pls the last one and it has to be like number 6

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15