Phoebe wants to get atleast a grade of 90 in the math class. her grade will be the average of two tests. she scored a 94 on the first test. write an inequality to represent the situation.

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.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?