Which of the following expressions are equivalent to -9.7\cdot -0.8\cdot -7.8\cdot 3.8−9.7⋅−0.8⋅−7.8⋅3.8minus, 9, point, 7, dot, minus, 0, point, 8, dot, minus, 7, point, 8, dot, 3, point, 8?

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24