# math

posted by
**mysterychicken**
.

18. Exponential growth follows the formula y= a(1+r)^x and exponential decay follows the formula y= a (1-r)^x. False?

23. In controlled experiments, the researcher is able to find a casual relationship between the variables- True

27. The explanatory and response variables in an experiment make up the hypothesis. True or False, not sure.