Given,
x
2
+
x
2
1
=98
(x+
x
1
)
2
=x
2
+
x
2
1
+2
98+2=100
∴x+
x
1
=10
(x+
x
1
)
3
=x
3
+
x
3
1
+3(x+
x
1
)
x
3
+
x
3
1
+3(x+
x
1
)=1000
x
3
+
x
3
1
=1000−3(10)=
Answer: she has 195 miles more to cover
Step-by-step explanation:
A salesperson has to drive 500 miles.
For the first three hours she drove at 65 miles/hour.
Distance = speed × time.
This means that distance covered in the first 3 hours is
65 ×3 = 195 miles
For the next two hours she drove at 55 miles per hour.
This means that distance covered in the next two hours is
55 × 2 = 110 miles
The total distance that the salesperson has to cover is 500 miles
Distance already covered is
195 + 110 = 305 miles
Distance remaining will be total distance - distance already covered. It becomes
500 - 305 = 195 miles
Number of bags per site tested before 2012 based on study it dropped by 62% down to 80 bags per site in 2012 is 129 (approximately).
As given,
In 2012, bag per site tested dropped by 62%
Let n be the number of bags per site before 2012
As per condition,
62% of n = 80
⇒(62/100) × n = 80
⇒ n = (80 × 100)/62
= 129.03
≈ 129
Therefore, number of bags per site tested before 2012 based on study it dropped by 62% down to 80 bags per site in 2012 is 129 (approximately).
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