The answer to the question is B you do not have to sign if you use a pin
Answer:
420
Step-by-step explanation:
The number of students in the school is unknown, so we'll call it x.
55% of the number of students are girls.
There are 321 girls.
55% of x = 231
0.55x = 231
x = 231/0.55
x = 420
Answer: 420
Step-by-step explanation:
this consists of 5 sides
top and bottom (equal)
left
right
front
the total surface area is the sum of all 5 areas.
the area of a rectangle is
length × width
the area of a triangle is
baseline × height / 2
in our case we have
top and bottom : 10×4/2 × 2 = 10×4 = 40 cm²
left : 8×9 = 72 cm²
right : 5×9 = 45 cm²
front : 10×9 = 90 cm²
the total surface area is
40 + 72 + 45 + 90 = 247 cm²
Answer:the percent decrease in the amount of water from 35gallons to 32 gallons is 8.6%
Step-by-step explanation:
The initial amount of water was 35 gallons.
Due to a leak, the amount changed to 32 gallons after 1 hour. After another hour, it decreased to 26 gallons.
The amount of water that was lost when the amount changed from 35 gallons to 32 gallons after 1 hour is
35 - 32 = 3 gallons.
Therefore, the percent decrease in the amount of water from 35 gallons to 32 gallons would be
3/35 × 100 = 8.6%
Answer: 42 more ounces
Step-by-step explanation: 16 oz = 1 pound, so multiply 3 and 16, which gives you 48. 48 oz+9 oz=57 oz. 57 oz-15 oz= 42 oz.
I hope this helps!
