Find the actual sum.2.835 + 2.449
A. 5.284
B. 0.386
C. 5.384
D. 6.943
Answer: A
Mathematics
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An acid solution has a pH of 2.3. Find the hydrogen ion concentration of this solution.
A. 5.01 mol/L [H+] B. 5.01 × 10-3 mol/L [H+] C. 2.00 × 10-12 mol/L [H+] D. 2.3 mol/L [H+]
Mathematics
Write the sum without sigma notation and evaluate it.
A. 2 sin ? + 2 sin 
+ 2 sin 
+ 2 sin 
= 2 + 
+ 
B. 2 sin ? + 2 sin 
+ 2 sin 
+ 2 sin 
= 6 + 
C. 2 sin ? + 2 sin 
= 
D. 2 sin ? + 2 sin 
+ 2 sin 
+ 2 sin 
= 1 + 
Mathematics
Convert the following.8 yd3 to cubic feet.
A. 512 ft3 B. 216 ft3 C. 72 ft3 D. 24 ft3
Mathematics
Solve the problem.Lesley purchased office supplies for her business. She spent $9 on paper, $8 on pens, $8 on folders, and $50 on computer disks. What was the total amount that she spent?
A. $71 B. $80 C. $67 D. $75
Mathematics