Even with most of the problem missing, it is possible to tell whether a suggested answer is reasonable. Determine whether the answer given is reasonable. If it is unreasonable, move the decimal point or insert a decimal point to make the answer reasonable.How tall is the child? 45 inches
A. Unreasonable, should be 4.5 inches
B. Unreasonable, should be 0.45 inches
C. Unreasonable, should be 450 inches
D. Reasonable
Answer: D
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Express the number in scientific notation.0.0000094714
A. 9.4714 x 10-7 B. 9.4714 x 10-5 C. 9.4714 x 10-6 D. 9.4714 x 106
Mark as true any statement that is always true. Mark as false any statement that is never true or that is not necessarily true. Be able to justify your answers.
1. A soccer ball is a regular polyhedron. 2. The lateral faces of a rectangular prism meet at the apex of the prism. 3. The two opposite faces of a cone are called the bases of the cone and they can be oval (elliptically) shaped as well as truly circularly shaped. 4. A pyramid with rectangular faces is called a rectangular pyramid.
Solve the problem.A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed the angle of depression to the boat is 16° 23'. When the boat stops, the angle of depression is 49° 29' . The lighthouse is 200 feet tall. How far did the boat travel from when it was first noticed until it stopped? Round your answer to the hundredths place.
A. 531.86 ft B. 554.56 ft C. 494.06 ft D. 509.36ft
Solve the problem.A computer can do one calculation in 1.4 × 10-7 seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 × 105 sec B. 1.4 × 106 sec C. 1.4 × 1012 sec D. 1.4 × 10-7 sec