Write an equation that expresses the relationship. Use k as the constant of variation.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 56 ft from a light is 2.7 foot-candles, find the intensity on a screen 70 ft from the light.

A. 1.728 foot-candles
B. 3.38 foot-candles
C. 2.16 foot-candles
D. 4.22 foot-candles


Answer: A

Mathematics

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A card is drawn randomly from a standard 52-card deck. Find the probability of the specified event. The card is a heart that is not a king.

A.  
B.  
C.  
D.

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Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.The name of each contestant is written on a separate card, the cards are placed in a bag, and three names are picked from the bag.

A. Systematic B. Stratified C. Convenience D. Simple random

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Round the whole number to its highest place value.414

A. 500 B. 300 C. 400 D. 410

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Begin by graphing the standard cubic function f(x) = x3. Then use transformations of this graph to graph the given function.g(x) = x3

A.

B.

C.

D.

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