Ana evaluated the expression x²y for x = 7 and y = 9. She got a value of 49. Which of the following statement is correct?.

By what percent will the product of two numbers change, if the first number increases by 70%, while the second number decreases by 40%.

It's 90 °f in the shop with high humidity. what pressure will be shown on the high-side pressure gauge (ac system on)?             a.  10 to 50 psi    b.  40 to 140 psi  c.  210 to 290 psi  d.  at least 350 psi

The graph shows the populations of two species over time. which type of symbiotic relationship does the graph represent? a. commensal b. mutualistic c. parasitic d. parent-offspring e. predator-prey