7 máquinas con un rendimiento de 45% pueden hacer una obra en 60 días trabajando 11 horas diario. ¿Cuántos días de 10 horas diario de trabajo se empleará para hacer otra obra, cuya dificultad y volumen sean 8/7 y 5/9 del anterior respectivamente, si se emplean 12 máquinas con un rendimiento del 55%?

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Is the figure congruent? yes or no?