SA=4pir^2
78.54km^2=SA
78.54=4pir^2
divide both sides by 4
19.635=pir^2
aprox pi=3.14 so divide both sides by 3.14
6.25318=r^2
sqrt both sides
2.50063=r
round
radius=2.5km
this question is flawed in that it gives the wrong units
answer is the option with 2.5 in it
2nd one
Answer:
C: 77 miles
Step-by-step explanation:
The points form a right triangle triangle with the legs being 44 and 63 and the distance between Washington and Midland being the hypotenuse.
See graph and connect the dots.
We can use the Pythagorean theorem to find the hypotenuse
a^2 +b^2 =c^2
44^2 + 63^2 = c^2
1936 + 3969 = c^2
5905 = c^2
Take the square root of each side
76.84399781
Rounding to the nearest mile
77 miles
Answer:
D
Step-by-step explanation:
You flip over the x-axis to form the same shape as triangle A'B'C'.
Then after reflecting over the x-axis, your triangle would be at the coordinates A(4, -2), B(1, -5), C(6, -4).
From there, you would move left 7 units to get to the same points as triangle A'B'C'
Answer:
h=2x-4/x not sure tho
Step-by-step explanation:
1: 8 faces and 9 with the base 9 vertices and 16 edges
2: 3 faces and 5 with the bases 6 vertices and 9 edges
3: 3 faces and 4 with the base 4 vertices and 6 edges
Hope this can help you.