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2 years ago

Emily an her dad share the cost of the meal in the ratio 2:3 emily’s Dad pays £52.20 what is the total cost of the meal

Mathematics

2 answers:

rodikova [14]2 years ago

6 0

£87.00

Emily's dad pays 3 parts of the meal

Divide £52.20 by 3 to find one part of the ratio

$\frac{52.20}{3}$ = £17.40 ← 1 part of the ratio

2 parts = 2 × £17.40 = £34.80 ← Emily's share

total cost = £52.20 + £34.80 = £87.00

Komok [63]2 years ago

6 0

Answer: The total cost of the meal is $87.

Step-by-step explanation:

Since we have given that

Ratio of cost of meal shared by Emily and her dad is 2:3

Cost of meal shared by Emily be 2x

Cost of meal shared by her dad be 3x

Cost paid by her dad = $52.20

So, Total cost will be

$\dfrac{3x}{5}=\$52.20\\\\x=\dfrac{52.20\times 5}{3}\\\\x=\$87$

Hence, the total cost of the meal is $87.

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2 years ago

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Answer:

a) P(μ-k*σ≤ Y ≤ μ+k*σ ) ≥ 0.90

a= μ-3.16*σ , b= μ+3.16*σ

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Step-by-step explanation:

from Chebyshev's inequality for Y

P(| Y - μ|≤ k*σ ) ≥ 1-1/k²

where

Y = the number of fish that need be caught to obtain at least one of each type

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thus for

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P{a≤Y≤b} ≥ 0.90 → 1-1/k² = 0.90 → k = 3.16

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using one-sided Chebyshev inequality (Cantelli's inequality)

P(Y- μ≥ λ) ≥ 1- σ²/(σ²+λ²)

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2 years ago

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Answer:

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Step-by-step explanation:

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$N(t)=N_{0} e^{-kt}$

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Begin by dividing the 100 on both sides to get

$.081=e^{-.00012t}$

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2 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

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Answer:

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Step-by-step explanation:

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It means Mr. Alvarez uses 12 cubic feet with 3 cement slabs.

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