A water tank holds 648 gallons but is leaking at a rate of 4 gallons per week. A second water tank holds 864 gallons but is leak
1 answer:
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Julie wants to express $108 in 6 weeks as a unit rate.
Her errors are:
$108 = $54 (Not true)
6 weeks = 3 weeks (Not true).
Instead,
The correct unit rate is 18 $/week.
Her errors are:
$108 = $54 (Not true)
6 weeks = 3 weeks (Not true).
Instead,
The correct unit rate is 18 $/week.
A
using the Cosine rule in ΔSTU
let t = SU, s = TU and u = ST, then
t² = u² + s² - (2us cos T )
substitute the appropriate values into the formula
t² = 5² + 9² - (2 × 5 × 9 × cos68° )
= 25 + 81 - 90cos68°
= 106 - 33.71 = 72.29
⇒ t = ≈ 8.5 in → A