Gabriella is designing a flashlight that uses a parabolic reflecting mirror and a light source. The shape of the mirror can be modeled by a parabola that opens upward with a diameter of 4 in. and a depth of 1 in. Where should she place the bulb to ensure a perfect beam of light? A.(0, 1)
B.(0, 4)
C.(1, 0)
D.(4, 0)

Write the factored form of this trinomial 9x^2+18x-7

Kilgore trout creates a new scale to diagnose depression. however, his scale only assesses one symptom of depression while ignoring others. which of the following is his new scale most likely lacking? a) test-retest reliability b) discriminant validity c) criterion validity d) alternate-forms reliability e) content validity f) none of the above

A33.33 percent decrease followed by a 50% increase. greater or larger that original amount?