Alice earned some money over the summer. she charged $11 per hour to baby-sit and $7.50 per hour to mow lawns. she baby-sat for 25 hours and mowed lawns for 19 hours.

how much money did alice make?

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Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Ten times the square of a non-zero number is eqaul to ninety times the number

The computer that controls a bank's automatic teller machine crashes a mean of 0.6 times per day. what is the probability that, in any seven-day week, the computer will crash less than 5 times? round your answer to four decimal places