Trees in urban areas keep air fresh by absorbing carbon dioxide. A city has $2400 to spend on planting spruce and maple trees. The land available for planting is 45,000 square feet. Spruce trees cost $20 to plant and require 300 square feet of space. Maple trees cost $30 to plant and require 900 square feet of space.

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

The function show two sisters' savings account and the rate at which they plan to deposit money

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)