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Purchasing power depends on how income growth compares to price growth (inflation). If wages rise 2% but prices rise 4%, real income (inflation-adjusted) falls by roughly 2% because income has not kept pace with cost of living. The HiSET Social Studies test includes basic economic reasoning like this to assess understanding of inflation, real vs. nominal values, and cost-of-living effects. Option A reverses the logic; a wage increase smaller than inflation cannot increase purchasing power. Option C incorrectly adds the rates. Option D ignores the gap between wage growth and price growth. As a rule of thumb, approximate real change ≈ nominal change − inflation rate, so 2%−4%=−2%2\% - 4\% = -2\%. In practice, compounding makes the exact figure slightly different, but for small percentages this subtraction is a sound estimate. Thus, the worker can buy fewer goods and services than before, meaning purchasing power decreases by about 2%. Therefore, B is correct.

Volume = base area × height. Solve for height: h=V÷A=120÷20=6h = V \div A = 120 \div 20 = 6. Correct choice: B. Many errors come from forgetting the formula involves multiplication, not addition. Unit check: cubic units ÷ square units = linear units, consistent with height. Correct: B.

The passage links the garden to two positive outcomes: increased consumption of fresh produce and enhanced neighbor interactions. The final sentence reinforces the social effect by comparing workdays to “block parties.” There’s no mention of noise (A), rules (C), or avoidance (D). On HiSET Reading, the central idea is the primary message supported by multiple details; here, both sentences point to nutritional and social benefits. Avoid over-reading: while we might infer improved health or community cohesion, the safest summary is that the garden boosts access to fresh food and fosters relationships. Therefore, B is correct.

“Therefore” introduces a conclusion or effect. “However” contrasts, “Moreover” adds, “For instance” illustrates. Correct: B.

The area formula for a rectangle is A=L×WA = L \times W. Here, 48=12×W48 = 12 \times W. Divide both sides by 12: W=48÷12=4W = 48 \div 12 = 4. Checking answer options, option C is 4, not D. Correction: the correct answer is C (4). This type of problem tests algebraic substitution and basic geometry skills. HiSET Mathematics often emphasizes solving for an unknown using formulas. Students should isolate the variable systematically. Missteps often include subtracting length instead of dividing. By checking through substitution, 12×4=4812 \times 4 = 48, confirming the solution. Thus, C is correct.