Answer:
48 miles per hour
Step-by-step explanation:
If they traveled 2400 miles and the total driving time was 50 hours, divide 2400/50 in order to find how many miles they drove per hour.
The correct option in A.
Lines 20-21 ("Nobody . . . died")
<h3>Briefing:</h3>
Nobody has succeed in this thing , and many have died.
This line belong to the 20-21 line for the phrase When fictional Swedish scientist went to the north pole for set up hydrogen- powered balloon.
<h3>Who is Swedish scientist ?</h3>
Only hydrogen offers helium-like lift; in fact, hydrogen offers 7-8% more lift than any other gas. In atmospheric sounding balloons outside of North America, hydrogen is frequently employed.
<h3>What is hydrogen- powered balloon?</h3>
Arrhenius, who was originally a physicist but is frequently referred to as a chemist, was one of the pioneers of the field of physical chemistry. He was the first Swedish Nobel laureate when he won the Chemistry Prize in 1903.
<h3>Why did they stop using hydrogen in balloons?</h3>
Despite being lighter than air, hydrogen is flammable, and since oxygen is present in the air, there is a chance of an explosion and fire. Since helium is a non-combustible gas and lighter than air, it is frequently used to fill balloons.
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F(x)= -8x²
f(-3)= -8* (-3)²
f(-3)= -8 * 9
f(-3)= -72
Answer:
Step-by-step explanation:
Given
5x+2y<40
x+3y<21
These two lines intersect at (6,5)
we have to maximize 10x+5y
Four corner points are
(0,0)
10(0)+5(0)=0
(0,7)10(0)+5(7)=35
(6,5)10(6)+5(5)=85
(8,0)10(8)+5(0)=80
At x=6 and y=5 optimal solution is obtained.
