Of 120 students in a school, 30 have reptiles as pets. what percent of the students have reptiles as pets?

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required

Amoving truck rental costs a flat fee of $75 and $2 per mile driven. if you drive a moving truck for 10 miles, how much is the rental for the moving truck?

X+ 4y − z = −14 5x + 6y + 3z = 4 −2x + 7y + 2z = −17