Write the number in standard form.2.19 × 10-4
A. 0.0000219
B. -219,000
C. 0.000219
D. 0.00219
Answer: C
Mathematics
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Evaluate the integral.
A. 1 B. 4 C. 0 D. 2
Mathematics
Round to the indicated place value.Round to the nearest one: 290.19
A. 291 B. 290 C. 290.20
Mathematics
Ions are atoms or groups of atoms with positive or negative electrical charges. The charges of some ions are given. Use this information to find the total charge. 
12 hydroxide ions
A. +24 B. -24 C. -12 D. +12
Mathematics
Evaluate.
A. 106 B. 1450 C. 178 D. 22
Mathematics