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MATH / The equation y=−6t²+43t describes the height (in feet) of a projectile t seconds after it is launched from the surface of Mars at 43 feet per second. In how many seconds will the p…

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Answer published by the source. Consult the official source to check your work against its answer.

problem

The equation y=−6t2+43ty = -6t^2 + 43t describes the height (in feet) of a projectile tt seconds after it is launched from the surface of Mars at 43 feet per second. In how many seconds will the projectile first reach 77 feet in height? Express your answer as a decimal rounded to the nearest tenth.
Plain-text mathematical notation (without MathML)
The equation y=−6t²+43t describes the height (in feet) of a projectile t seconds after it is launched from the surface of Mars at 43 feet per second. In how many seconds will the projectile first reach 77 feet in height? Express your answer as a decimal rounded to the nearest tenth.
Original LaTeX notation
The equation $y = -6t^2 + 43t$ describes the height (in feet) of a projectile $t$ seconds after it is launched from the surface of Mars at 43 feet per second. In how many seconds will the projectile first reach 77 feet in height? Express your answer as a decimal rounded to the nearest tenth.

level

Level 4

type

Algebra

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Source and history

task_id
1daf17b1-e3ab-5508-a58f-3ca15d780762
task_key
algebra--test--1daf17b1-e3ab-5508-a58f-3ca15d780762
task_revision_id
1
config / split
algebra / test

Official source

initial import