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3 years ago

Help me please I don’t understand

Mathematics

2 answers:

tester [92]3 years ago

8 0

Answer:

5 feet

Step-by-step explanation:

15 divided by 3 equals 5

Afina-wow [57]3 years ago

4 0

Answer:

1cm = 5 feet.

Step-by-step explanation:

It is saying that the real room is 15 feet for every 3 cm.

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-1(n2 + 3) if n = -3.

Soloha48 [4]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

5. The points (4, 1) and (x,-6) lie on the same line. If the slope of the line is 1, what is the value of

Rzqust [24]

$\frac{1 + 6}{x - 4} = 1$

$x - 4 = 7$

$x = 11$

8 0

2 years ago

Help me please I have a d+ in math and I really need help

Flura [38]

Hey don’t worry about that grade just keep practicing maths and honestly at one point you’ll start understanding the concepts trust me. Just do it a lot.

So here are my explanations

8 0

3 years ago

A certain drug treatment cures 90% of cases of hookworm in children.18 Suppose that 20 children suffer- ing from hookworm are to

Anni [7]

Answer:

Step-by-step explanation:

Here X the no of children suffering from hookworm treated and recovered is binomial because

a) Each child is independent of the other

b) There are only two outcomes

c) The probability for any child to recover is constant as 90% = 0.9

X is Bin (20,0.9)

a) Prob that all 20 will be cured

=P(X=20)= $0.9^{20} \\=0.1216$

b) Prob all but 1 will be cured= $P(x=1) = 20C1 (0.9) (.1)^{19} \\=1.8(10^8)$

c) Prob exactly 18 will be cured

$=P(X=18)\\=20C18 (0.9)^{18} (0.1)^2\\= 0.2852$

d) Prob exactly 90% will be cured.

= $P(X=18)\\=20C18 (0.9)^{18} (0.1)^2\\= 0.2852$

7 0

4 years ago

Suppose you invest $200 a month for 7 years into an account earning 9% compounded monthly. After 7 years, you leave the money, w

never [62]

Answer:

$172,806.37.

Step-by-step explanation:

Total = [ P(1+r/n)^(nt) ] + [ PMT × (((1 + r/n)^(nt) - 1) / (r/n)) ] * (1 + r/n)

is the formula for the amount left after the first 7 years where the money is deposited at the beginning of each month and P = initial amount, PMT = monthly payment, r = rate as a decimal and t = time in years.

Total after the first 7 years

= [ 200(1+0.09/12)^(7*12) ] + [ 200 × (((1 + 009/12)^(7*12) - 1) / (0/09/12) ] * (1 + 0.09/12)

= 374.64 + (200 * 0.8732019633) / (0.09/12) * (1 + 0.09/12)

= 374.64 + 23485.386 * 1.0075

= $24.036.17

Total after a further 22 years:-

= 24.036.17(1 + 0.09/12)^(12*22)

= $172,806.37 (answer).

3 0

3 years ago