# Power - practice problems - page 2 of 29

Power is the amount of work done (energy supplied) per unit time. In physics, power is the amount of energy transferred or converted per unit time. In the SI units, the unit of power is the watt, equal to one joule per second. Other units are, for example, 1 hp (one horsepower; 1 hp = 735.5 W) and then derived units such as kW - kilowatt.#### Number of problems found: 570

- False positive, false negative

Suppose the likelihood of someone being allergic to cats is 1/1000 of the general population. A test to determine if you're allergic to cats has a false positive rate of 5%; that is, 5% of the time, the test will indicate incorrectly that you are allergic - Evaluate 32

Evaluate the following expression: 18 * (1 + 9³) - 3 + (20/2) 18 times (1 + 9 to the 3rd power) minus 3 plus (20 divided by 2) - Solve 23

Solve the following inequality: 4 - ½ (2 x - 3) < 1/3 (5 - 3 x) - Choose 2

Choose an equivalent expression for three-fourths raised to the fourth power times three-fourths raised to the third power, all raised to the second power.

- Geometric series

How many terms of the geometric series 8+4+2+1+0.5+... must be taken for the sum to get within 10 to the power minus 4 of its sum to infinity? - Cost and sell price

A wholesaler sold items at a profit of 20% of the sales, which was a profit of P52.80. What were the cost price and selling price of the item? - Simple interest 5

At what simple interest rate should Renel invest his P45,000 so that it earns P5,500 in 1 year and 5 months? - Opposite or reciprocal

How is 4 related to 4³? ... - Triangle 82

Triangle PQR has vertices located at (2, 2), (5, -4), and (-4, -1). What type of triangle is triangle PQR?

- Consecutive Interior Angles

PQRS is a trapezium in which PQ is parallel to SR and ∠P = 130 ̊, ∠Q = 110 ̊. Find the remaining angles. - The width 2

The width of stamp M is 4/3 inches, and the length is 7/5 inches. The dimensions of stamp M are 7/6 times the dimensions of stamp P. What is the length of stamp P in inches? - Body mass index

Compute for BMI, then classify: Nr; weight ; height 1; 35 kg ; 1.25 m 2; 40 kg; 1.40 m 3; 50 kg; 1.75 m 4; 55 kg; 1.65 m 5; 63 kg; 1.23 m - Let z 2

Let z = 2 - sqrt(3i). Find z^{6}and express your answer in rectangular form. if z = 2 - 2sqrt(3 i) then r = |z| = sqrt(2 ^ 2 + (- 2sqrt(3)) ^ 2) = sqrt(16) = 4 and theta = tan -2√3/2=-π/3 - Seamstresses 83192

Three sewers sew 7 skirts in 15 hours. How many skirts can 2 seamstresses make in 50 hours?

- Original 83173

When drying, the modeling mass loses 36% of its original volume. If the cube's volume is 5.12 dm³ after drying, what was the original length of the edge? - Cylinder - curved area

The curved area of the rotary cylinder is three times greater than the area of one base of this cylinder. The radius of the base of the cylinder is 10 cm. What is the surface area of the cylinder? - Strawberries 82738

Three classmates worked part-time during the summer vacation harvesting strawberries. Jan collected 145 baskets of strawberries during the entire brigade. Peter collected 185 baskets. How many baskets did their classmate Stan collect if we know that the b - Expression 82698

Calculate the value of the expression V = 3x²- 2x + 3 for x = -2. - Coordinate 82580

Write the equation of the ellipse that passes through the points, and its axes are identical to the coordinate axes when A = [2, 3] and B = [−1, −4].

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