Tracy and Dave together complete the task in hours
Given Tracy alone take 8 hours to complete work and dave alone take 12 hours to complete the work.
Let's say together they worked in x hours
⇒in 1 hour they worked th part of the work
Tracy herself worked 8 hours to complete the whole task
⇒ in 1 hour Tracy completes th part of the task
Dave himself worked 8 hours to complete the whole task
⇒ in 1 hour Dave completes th part of the task
By proportions
⇒+= { using operation addition}
⇒ x=
Therefore,Tracy and Dave together complete the task in hours
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The answer is 488.
22*17=374
12*19=228
228/2=114
374+114=488
Answer:
Midpoint = (-3, 4.25)
Step-by-step explanation:
Answer:
The slope will be 2/2 which is equal to 1.
Answer:
See below in bold.
Step-by-step explanation:
1. The sequence is 1000, 2000, 4000, 8000.
2. The common ratio is 2000/1000 = 2.
3. Number of bacteria after 7 hours is 1000(2)^(7- 1)
= 64,000.
4. 1000(2)^(x-1) > 1,000,000
2^x-1 > 1000
x- 1 log 2 > log 10
x- 1 > 9.96
x > 10.96
During the 11th hour.