A dog food claims to make dogs coats shiner and healthier looking. A researcher wants to test the claims. They plan to randomly select pet store shoppers to participate and assign them to two groups. choose one:

-census

-cluster sampling

-convenience sampling

-simple random sampling

-stratified sampling

choose one:

-experiment

-observational study

-simulation

-survey

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.