Solve
-A Projectile Is Thrown Upward So That Its Distance $t$

question 44

Multiple Choice

Solve.
-A projectile is thrown upward so that its distance above the ground after $t$ seconds is $h ( t ) = - 16 t ^ { 2 } + 420 t$ . After how many seconds does it reach its maximum height?

• A) \(7 \mathrm { sec }\)
• B) \(28 \mathrm { sec }\)
• C) \(21 \mathrm { sec }\)
• D) \(13 \mathrm { sec }\)

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Definitions:

Variable Selling Expense

includes costs that vary directly with sales volume, such as commissions, shipping charges, and promotional expenses.

Direct Labor Wage Rate

The amount paid per hour or per unit of production to employees who directly manufacture or assemble products.

Raw Materials Cost

The total expense associated with the raw materials used in the production of goods or services.

Administrative Expense

Costs related to the general administration of a business, such as salaries of executive officers and costs of general services.