Provide an appropriate response.Which of these numbers are called factors: 2 ? 5 = 10 ?
A. 2, 5, and 10
B. 2 and 5
C. 5 and 10
D. 2 and 10
Answer: B
Mathematics
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An aqueous solution has a hydrogen concentration [H+] of 2.85 × 10-1. Find the concentration of hydroxl ions [OH-] in the solution.
A. 3.51 × 10-14 mol/L OH- B. 3.51 × 1014 mol/L OH- C. 3.51 × 10-13 mol/L OH- D. 2.85 × 10-14 mol/L OH-
Mathematics
Provide an appropriate response. In the relationship of 330 is 165% of 200, which value is the rate?
A. 330 B. 100% C. 165% D. 200
Mathematics
Use the even-odd identities to find the exact value of the expression. cos (-30°)
A. - 
B. - 
C. 
D. 
Mathematics
Solve the problem.The sum of the squares of the digits of a positive two-digit number is 61, and the tens digit is 1 more than the units digit. Find the number.
A. 65 B. 56 C. 54 D. 45
Mathematics