In total school choir has 80 students, with 36 of them being in seventh grade. also, 40 students in the choir are girls where 18 of them are in seventh grade. what is the probability that a student picked at random from the choir is either a girl or is in seventh grade?

Ineed with number 6 , explain how to get 1978

Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.