The <em><u>correct answer</u></em> is:
7.8 × 10⁷
Explanation:
To write a number in scientific notation, we want the decimal behind the first non-zero digit in the number. The first non-zero digit in 78 is 7; this means we want 7.8. In order to have the decimal point behind the 7, we need to move the decimal 7 places. This is the exponent of 10 in our scientific notation, which gives us
7.8 × 10⁷
Um. i’m pretty sure it’s just 30 feet
Answer:
0.59375
Step-by-step explanation:
3f(x) - f(1/x) = x^2
x = 2: 3f(2) - f(1/2) = 2^2
x = 1/2: 3f(1/2) - f(2) = (1/2)^2
Let a = f(1/2) and b = f(2):
3b - a = 4; 3a - b = 1/4
3b - 4 = a
3(3b-4) - b = 1/4
8b = 12 + 1/4
b = 1.53125
3 * 1.53125 - 4 = a
a = 0.59375
Answer:
Step-by-step explanation:
we know that
so solve for x
Answer:
quarters are 20 in number.
Step-by-step explanation:
Let <em>d</em> represent dimes
Let <em>q</em> represent quarters
d + q = 35
q = d+5
d+d+5=35
2d=35-5
2d =30
d = 30/2
therefore dimes =15
Substitute d for 15 to solve for q;
q=15+5
therefore quarters are 20 in number.
