Sam estimates that he has 8.6 × 105 corn plants on 44 acres.

a. How many plants does he have per acre?
b. He planted 22,500 kernels per acre. What was the percent of germination of the corn?


a. 19,545 plants/a
b. 87%

Trades & Technology

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Melting alloy and bimetallic overload relays are designed to _____.

a. trip an alarm signal b. keep the motor operating in the event of a sustained overload c. react to changes in the motor load current d. divert excessive current to prevent overheating

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_______________________ facilitates the spreading of lubricant film into narrow spaces between equipment components.

Fill in the blank(s) with the appropriate word(s).

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The first consortium to deploy satellite telephony, whose intent is to provide dial tone anywhere in the world without the need for wires, cellular towers, or other land-oriented connections is:

A) Teledesic B) Globalstar C) Iridium D) all of the above share the same objective and were deployed at the same time

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When under severe braking, the wheels of a trailer lock causing it to spin around while the tractor remains in a straight-ahead position, the condition is known as:

A. jackknife B. trailer swing C. plow-out D. brake fade

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