Questions in Grade College

Questions in Grade College

[Free] Solve $x^2-8 x=20$ by completing the square. Which is the solution set of the equation? A. $\{-22,14\}$ B. $\{-14,22\}$ C. $\{-10,2\}$ D. $\{-2,10\}$

[Free] Hearing damage can occur at work if the noise level is at or above: A. 60 decibels B. 85 decibels C. 100 decibels D. 850 decibels

[Free] Leeann works 20 hours per week and makes $15 per hour. What is her yearly pay? A. $10,100 B. $12,500 C. $15,600 D. $18,200

[Free] You place a large pear on a scale and it shows a mass of 200 grams. What is the mass of that pear in centigrams? Remember: King Henry Doesn't Usually Drink Chocolate Milk! A. 2000 centigrams B. 2 centigrams C. 20,000 centigrams D. 20 centigrams

[Free] When 40.0 mL of $1.00 M H _2 SO _4$ is added to 80.0 mL of 1.00 M NaOH at $20.00^{\circ} C$ in a coffee cup calorimeter, the temperature of the aqueous solution increases to $29.20^{\circ} C$. If the mass of the solution is 120.0 g and the specific heat of the calorimeter and solution is $4.184 J / g \cdot{ }^{\circ} C$, how much heat is given off in the reaction? (Ignore the mass of the calorimeter in the calculation.) Use $q=m C_p \Delta T$. A. 4.62 kJ B. 10.0 kJ C. 14.7 kJ D. 38.5 kJ

[Free] Kito makes an online purchase of a guitar case for $39.99, a tuner for $24.99, and picks for $26.99. Taxes are 6% of the total purchase price. Shipping charges are based on the following table: | Amount of Purchase | Standard Shipping | Express Shipping | | :----------------- | :---------------- | :--------------- | | up to $50 | $5.10 | $7.00 | | $50 up to $100 | $6.35 | $8.20 | | $100 up to $200 | $7.80 | $11.60 | | $200 and over | $10.50 | $16.45 | Kito selects express shipping, and the company bills his credit card $105.69 for the total of the online purchase. Determine if Kito has been billed correctly for his purchase. A. Kito has been billed correctly. B. Kito has not been charged enough for his purchase. C. Kito has been overcharged by $1.85 for his purchase. D. Kito has been overcharged by $3.40 for his purchase.

[Free] Which type of character is a three-dimensional or multifaceted character? A. A flat character B. A round character C. A climactic character

[Free] Which of the following BEST illustrates a primary air pollutant? A. Carbon dioxide released from the burning of coal. B. Sulfur trioxide produced when sulfur dioxide reacts with oxygen in the air. C. Ozone produced in photochemical smog. D. Carbon dioxide released through photosynthesis.

[Free] Victoria drove $21^1 / 2$ miles in $2 / 3$ of an hour. What was her speed? A) $32^1 / 3$ miles per hour B) $32^3 / 4$ miles per hour C) $32^1 / 4$ miles per hour D) $32^1 / 2$ miles per hour

[Free] Use a calculator to find the result of the following operations with five decimal places of approximation. a) [tex]$\sqrt{3}+\sqrt{5}$[/tex] b) [tex]$\sqrt{7}(\pi-\sqrt{5})$[/tex] c) [tex]$\pi(2-3 \pi-\sqrt{11})$[/tex]