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Semmy [17]
3 years ago
6

Help&EXPLAIN ••••••••••••••••••• Help plz

Mathematics
1 answer:
Stolb23 [73]3 years ago
3 0

Answer:

diameter = 2.5 feet

Step-by-step explanation:

Circumference of a circle is given as C = πd

Circumference of the tree trunk = 7.85 ft

π = 3.14

Diameter of the tree trunk = d

Thus:

7.85 = 3.14*d

Divide both sides by 3.14

7.85/3.14 = 3.14*d/3.14

2.5 = d

d = 2.5 ft

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Someone please help me with my homework please please help please help me with my homework
densk [106]
C=2x Pi x R so 2x3.14x17.5 = 109.9
5 0
3 years ago
There are 24 muffins in a bakery. If 3/8 of the muffins are blueberry, how many muffins are blueberry?
alex41 [277]

Answer:

9

Step-by-step explanation:

3/8 = 0.375

0.375(24) = 9

5 0
3 years ago
Read 2 more answers
Which graph best represents y=−2x+3
Savatey [412]

Answer:

download graphing calc, it'll help u sm

Step-by-step explanation:

  °   •  .°•    ✯

   ★ *     °      °·                            

.   • ° ★ •  ☄

▁▂▃▄▅▆▇▇▆▅▄▃▁▂

4 0
3 years ago
What is the sum of the rational expressions below? X/4 + 3/5x
Andrew [12]

Answer:

The answer is  \frac{5x^2+12}{20x} .

Step-by-step explanation:

Given:

X/4 + 3/5x.

Now, to find the sum of the rational expressions.

\frac{x}{4} +\frac{3}{5x}

So, to solve it by adding:

\frac{x}{4} +\frac{3}{5x}

=\frac{5x\times x+3\times 4}{5x(4)}

=\frac{5x^2+12}{20x}

Therefore, the answer is  \frac{5x^2+12}{20x} .

4 0
3 years ago
Using the bijection rule to count binary strings with even parity.
AleksandrR [38]

Answer:

Lets denote c the concatenation of strings. For a binary string <em>a</em> in B9, we define the element f(a) in E10 this way:

  • f(a) = a c {1} if a has an odd number of 1's
  • f(a) = a c {0} if a has an even number of 1's

Step-by-step explanation:

To show that the function f defined above is a bijective function, we need to prove that f is well defined, injective and surjective.

f   is well defined:

To see this, we need to show that f sends elements fromo b9 to elements of E10. first note that f(a) has 1 more binary integer than a, thus, it has 10. if a has an even number of 1's, then f(a) also has an even number because a 0 was added. On the other hand, if a has an odd number of 1's, then f(a) has one more 1, as a consecuence it will have an even number of 1's. This shows that, independently of the case, f(a) is an element of E10. Thus, f is well defined.

f is injective (or one on one):

If a and b are 2 different binary strings, then f(a) and f(b) will also be different because the first 9 elements of f(a) form a and the first elements of f(b) form b, thus f(a) is different from f(b). This proves that f in injective.

f is surjective:

Let y be an element of E10, Let x be the first 9 elements of y, then f(x) = y:

  • If x has an even number of 1's, then the last digit of y has to be 0, and f(x) = x c {0} = y
  • If x has an odd number of 1's, then the last digit of y has to be a 1, otherwise it wont be an element of E10, and f(x) = x c {1} = y

This shows that f is well defined from B9 to E10, injective, and surjective, thus it is a bijection.

3 0
3 years ago
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