$2,500 is invested in an account earning 8.4% interest compounded annually. how many years did it take to reach $4,000?
a.
3 years
b.
4 years
c.
5 years
d.
6 years

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.