a community built the sandbox action in the playground section at one of those who park the area of the playground section is 1,675 square feet. it is 100 square feet more than 4.5 times the area of the sandbox section. Write an expression and what is the are of the sandbox section?

Me find the measure to side c and the process to solve the problem you appreciate it : )

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?