Which situation is best represented by a negative number? A
3
a gram weight
1,000
B) a temperature of 6 degrees
a height of 0.5 meters
(D) a debt of 7 dollars

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?