Multiply mentally.
?
?
What will be an ideal response?
Mathematics
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Write the number in scientific notation. One milligram is about 0.015430 grain.
A. 0.1543 × 10-1 B. 15.43 × 10-3 C. 1.543 × 10-2 D. 1.543 × 10-3 E. 0.015430 × 10-2
Mathematics
Solve the problem. Express any improper fraction as a whole or mixed number.Martha can rake the leaves in her yard in 2 hours. Her brother can do the job in 6 hours. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 1
hr
D. 3 hr
Mathematics
Multiply and simplify.
? 
A. 
B. 
C. 
D. 
y
Mathematics
Solve the problem.A camera costs $600. If the sales tax rate is 7%, how much tax is charged and what is the total price? Round your answers to the nearest cent.
A. $420.00, $1020.00 B. $42.00, $642.00 C. $48.00, $648.00 D. $36.00, $636.00
Mathematics