First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Tran's subtotal at Scramble's Electronics is $344.83. The sales tax on these items is $20.38. What was Tran's total bill?

A. Estimate: $280; exact: $324.45
B. Estimate: $300; exact:  $365.21
C. Estimate: $320; exact:  $365.21
D. Estimate: $365.21; exact:  $365.21


Answer: C

Mathematics

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Answer the question.Which one of the following is the correct method for evaluating the expression 

A. 3 ? 62 - 4 = 182 - 4 = 324 - 4 = 320 B. 3 ? 62 - 4 = 3 ? 22 = 3 ? 4 = 12 C. 3 ? 62 - 4 = (18 - 4)2 = 14 = 196 D. 3 ? 62 - 4 = 3 ? 36 - 4 = 108 - 4 = 104

Mathematics

The size of two matrices is given. Find the size of the product AB and the product BA, if the products exist.A is 2 × 4, B is 2 × 4.

A. AB is 2 × 4, BA is 4 × 2. B. AB is 4 × 2, BA is 2 × 4. C. AB is 2 × 2, BA is 4 × 4. D. AB is undefined, BA is undefined.

Mathematics

Solve for x.33x - 1 = 243

A. x = 2 B. x = 1 C. x = 3 D. x = 4

Mathematics

Use the graph of a power function and transformations to sketch the graph of the polynomial function.f(x) = x5

A.

B.

C.

D.

Mathematics