Please help me in this because I need to get my grade up

Which is relatively better: a score of 76 on a psychology test or a score of 22 on an economics test? scores on the psychology test have a mean of 90 and a standard deviation of 13. scores on the economics test have a mean of 52 and a standard deviation of 10.

Thermal expansion is an example of? a) mechanical weathering b) chemical weathering c) erosion d) molecular weathering

Which of the following statements is true regarding adolescent ethnicity and self-esteem? select one: a. teens of all ethnicities in the u.s. are likely to experience a brief increase in self-esteem as they transition into early adolescence. b. teens of all ethnicities in the u.s. are likely to experience a drop in self-esteem as they transition from childhood to early adolescence. c. ehtnic minority teens in the u.s. are likely to experience a drop in self-esteem as they transition from childhood to early adolescence.