According to Erikson, and infant develops a sense of _____ if the infant is provided with a source of nourishment, warmth, love, and protection

All of the following factors contribute to difficulties completing mathematical word problems except

A) number of words. B) number of mathematical operations. C) using a familiar context. D) the problem is not interesting.

What is the mean of these data: 2, 4, 5, 4, 4, 1, 1?

a. 3 b. 4 c. 5 d. 7 e. 21