Answer:
60 gallons of 70% antifreeze
Step-by-step explanation:
Let n be the amount of 70% antifreeze. And the second brand was 45% pure anti freeze Then:
According to the question
0.7 n+.45(150-n)=0.55(150)
0.7 n+67.5-0.45 n=82.5
0.25×n=15
n=15/.25 = 60
You need 60 gallons of 70% antifreeze, and 90 gallons of 45% antifreeze for this mixture
Answer:
31 degrees
Step-by-step explanation:
1. triangle= 180 degrees.
2. 84+ x + (180-115)= 180
3. 84+65+ x= 180
4. 180- 149= 31
5. x= 31
Answer:
$180,000.
Step-by-step explanation:
We have been given that a student attends a four-year college with tuition costs of $20,000 per year, room and board costs of $5,000 per year, and books/entertainment costs of $1,000 per year. If the student did not go to college, she would work at a job that pays $25,000 per year but still face the same room and board and entertainment expenses.
We know that opportunity cost is the profit lost, when one alternative is selected over another.
Opportunity cost of attending college for 4 years would be amount lost from job in 4 years plus amount spent on studies because the student lost $25,000 for four years for not doing the job and spent $20,000 for 4 years on studies.
Therefore, the opportunity cost of attending college for this student for four years is $180,000.
Answer:
1. 30%
2. 55%
Step-by-step explanation:
1. 12/40 × 100
=1200/40
=30%
2. 33/60 × 100
=3300/60
=55%
Answer: 125.6
Step-by-step explanation:
C=dpi. If 40 times 3.14 equals 125.6 then that is the circumference.