SKILL LEVEL Mastery
A motor boat travels a certain distance downstream in 5 hours.
It travels the same distance upstream in five and a half hours.
The speed of the water is 1.5 km/hr. What is the speed of the
boat in still water?
a 25.7 km/hr
b 31.5 km/h
C 48.2 km/h
d 18.5 km/h

Which expression is equivalent to (5x^7+7x^8) − (4x^4−2x^8)? a. 9x^8 + 5x^7−4x^4 b. 3x^8 + 7x^7 c. 12x^8 − 2x^4 d. 5x^8 + 5x^7 + 4x^4

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.

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