Express the number in scientific notation.870,000
A. 8.7 × 105
B. 8.7 × 104
C. 8.7 × 10-4
D. 8.7 × 10-5
Answer: A
Mathematics
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Solve the equation by using the quadratic formula. Give only real number solutions.x2 + x + 3 = 0
A. 
B. ?
C. 
D. 
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Use the figure to find the specified vector.Find a + b.
A. 
B. 
C. 
D. 
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Factor the binomial completely.24t3 - 3
A. 3(2t - 1)(4t2 - 2t + 1) B. 3(2t + 1)(4t2 - 2t + 1) C. 3(2t - 1)(4t2 + 2t + 1) D. 3(2t - 3)(4t2 + 6t + 3)
Mathematics
Solve the problem.A chemist needs 130 milliliters of a 72% solution but has only 17% and 82% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 100 mL of 17%; 30 mL of 82% B. 20 mL of 17%; 110 mL of 82% C. 110 mL of 17%; 20 mL of 82% D. 30 mL of 17%; 100 mL of 82%
Mathematics