4. American Ceramics, Inc. (ACI) has been developing a new form of ceramic that can stand high temperatures and sustained use. Because of its improved properties, the project development engineer in charge of this project thinks that the new ceramic will compete as a substitute for the ceramics currently used in spark plugs. She talks to ACI’s market research director about conducting a survey of prospective buyers of the new ceramic material. During their phone conversation, the research director suggests a study using about 100 companies as a means of determining market demand. Later that day, the research director does some background using the Thomas Register as a source of names of companies manufacturing spark plugs. A total of 312 companies located in the continental United States are found in the Register. How should this finding impact the final sample size of the survey? (3 points)

answer is more than one

step-by-step explanation:

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2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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d 600 because 15*10*2=300

300+300=600

step-by-step explanation: