Investment in human capital is best described as a. accumulating machinery and equipment to improve returns to scale. b. contributing to employee retirement plans to reduce worker turnover. c. investing in companies that promote positive work–life balances for workers. d. investing in education and training to improve a worker's productivity.

D. investing in education and training to improve a worker's productivity

Explanation:

Human capital is an intangible asset. It is the total stock of knowledge, abilities, skills that labour has which enhances labour's production activities.

Human capital can be improved through education and training. These are forms of investment in human capital.

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"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"