If ab = 21 centimeters, and bc = 28 centimeters, which does ac equal?
1 answer:
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Incomplete Question the Complete Question is here
Refer to the diagram below. Surveyors know that ∆PQR and ∆STR are similar. What is PQ, the distance across the lake?
3.20 km
3.60 km
2.80 km
3.24 km
Answer:
The Last option is correct 3.24 km
Therefore the distance across the lake is PQ = 3.24 km.
Step-by-step explanation:
Given:
ΔPQR and ΔSTR are Similar
ST = 1.80 km
TR = 1.25 km
QR = 2.25 km
To Find:
Distance across the lake, PQ = ?
Solution:
ΔPQR ~ ΔSTR ..........Given:
If two triangles are similar then their sides are in proportion.
Substituting the values we get
Therefore the distance across the lake is PQ = 3.24 km.
Answer: A) The initial number of bacteria is 350.
Step-by-step explanation:
Exponential growth equation: , where A=Initial value, r= growth rate. (i)
Given: A bacteria sample can be modeled by the function which gives the number of bacteria in the sample at the end of x days.
Here,
Compare this equation to (i) , we get A = 350 and r= 0.20 = 20% (growth rate)
So, the best interpretation of one of the values in this function are:
A) The initial number of bacteria is 350.