Cho tam giác ABC vuông tại A,đường cao AH. E và F là chân đường vuông góc kẻ từ H tới AB và AC a)tính HA, HB và HC và diện tích tứ giác BEFC biết AB=3m, AC=4cm

b)M và N là trung điểm của HB và HC. tính diện tứ giác EFMN

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry

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b

step-by-step explanation:

this is because the profit is decreasing and turning into debt